1242264531 has 4 divisors (see below), whose sum is σ = 1656352712. Its totient is φ = 828176352.

The previous prime is 1242264497. The next prime is 1242264533. The reversal of 1242264531 is 1354622421.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1242264531 - 2¹³ = 1242256339 is a prime.

It is a super-2 number, since 2×1242264531² = 3086442329961299922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242264533) 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, 207044086 + ... + 207044091.

It is an arithmetic number, because the mean of its divisors is an integer number (414088178).

Almost surely, 2^1242264531 is an apocalyptic number.

1242264531 is a deficient number, since it is larger than the sum of its proper divisors (414088181).

1242264531 is an equidigital number, since it uses as much as digits as its factorization.

1242264531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414088180.

The product of its digits is 11520, while the sum is 30.

The square root of 1242264531 is about 35245.7732359499. The cubic root of 1242264531 is about 1074.9906704797.

Adding to 1242264531 its reverse (1354622421), we get a palindrome (2596886952).

The spelling of 1242264531 in words is "one billion, two hundred forty-two million, two hundred sixty-four thousand, five hundred thirty-one".