1241264533 has 4 divisors (see below), whose sum is σ = 1242972640. Its totient is φ = 1239556428.

The previous prime is 1241264513. The next prime is 1241264543. The reversal of 1241264533 is 3354621421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3354621421 = 4817 ⋅696413.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1241264533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1241264495 and 1241264504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1241264513) 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, 852963 + ... + 854416.

It is an arithmetic number, because the mean of its divisors is an integer number (310743160).

Almost surely, 2^1241264533 is an apocalyptic number.

It is an amenable number.

1241264533 is a deficient number, since it is larger than the sum of its proper divisors (1708107).

1241264533 is an equidigital number, since it uses as much as digits as its factorization.

1241264533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708106.

The product of its digits is 17280, while the sum is 31.

The square root of 1241264533 is about 35231.5843101045. The cubic root of 1241264533 is about 1074.7021444128.

Adding to 1241264533 its reverse (3354621421), we get a palindrome (4595885954).

The spelling of 1241264533 in words is "one billion, two hundred forty-one million, two hundred sixty-four thousand, five hundred thirty-three".