1226361451 has 4 divisors (see below), whose sum is σ = 1401555952. Its totient is φ = 1051166952.

The previous prime is 1226361431. The next prime is 1226361491. The reversal of 1226361451 is 1541636221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1541636221 = 23473 ⋅65677.

It is a cyclic number.

It is not a de Polignac number, because 1226361451 - 2¹¹ = 1226359403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1226361421) 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, 87597240 + ... + 87597253.

It is an arithmetic number, because the mean of its divisors is an integer number (350388988).

Almost surely, 2^1226361451 is an apocalyptic number.

1226361451 is a deficient number, since it is larger than the sum of its proper divisors (175194501).

1226361451 is an equidigital number, since it uses as much as digits as its factorization.

1226361451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175194500.

The product of its digits is 8640, while the sum is 31.

The square root of 1226361451 is about 35019.4438990684. The cubic root of 1226361451 is about 1070.3837244268.

Adding to 1226361451 its reverse (1541636221), we get a palindrome (2767997672).

The spelling of 1226361451 in words is "one billion, two hundred twenty-six million, three hundred sixty-one thousand, four hundred fifty-one".