1246221133 has 4 divisors (see below), whose sum is σ = 1246689340. Its totient is φ = 1245752928.

The previous prime is 1246221127. The next prime is 1246221139. The reversal of 1246221133 is 3311226421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3311226421 = 3539 ⋅935639.

It is an interprime number because it is at equal distance from previous prime (1246221127) and next prime (1246221139).

It can be written as a sum of positive squares in 2 ways, for example, as 394340164 + 851880969 = 19858^2 + 29187^2 .

It is a cyclic number.

It is not a de Polignac number, because 1246221133 - 2¹³ = 1246212941 is a prime.

It is a super-2 number, since 2×1246221133² = 3106134224671607378, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1246221098 and 1246221107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1246221139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230088 + ... + 235441.

It is an arithmetic number, because the mean of its divisors is an integer number (311672335).

Almost surely, 2^1246221133 is an apocalyptic number.

It is an amenable number.

1246221133 is a deficient number, since it is larger than the sum of its proper divisors (468207).

1246221133 is an equidigital number, since it uses as much as digits as its factorization.

1246221133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468206.

The product of its digits is 1728, while the sum is 25.

The square root of 1246221133 is about 35301.8573590682. The cubic root of 1246221133 is about 1076.1307396888.

Adding to 1246221133 its reverse (3311226421), we get a palindrome (4557447554).

The spelling of 1246221133 in words is "one billion, two hundred forty-six million, two hundred twenty-one thousand, one hundred thirty-three".