1242440031 has 48 divisors (see below), whose sum is σ = 1976486400. Its totient is φ = 691996032.

The previous prime is 1242439997. The next prime is 1242440033. The reversal of 1242440031 is 1300442421.

It is not a de Polignac number, because 1242440031 - 2⁷ = 1242439903 is a prime.

It is a super-2 number, since 2×1242440031² = 3087314461262561922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242440033) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 963235 + ... + 964523.

It is an arithmetic number, because the mean of its divisors is an integer number (41176800).

Almost surely, 2^1242440031 is an apocalyptic number.

1242440031 is a deficient number, since it is larger than the sum of its proper divisors (734046369).

1242440031 is a wasteful number, since it uses less digits than its factorization.

1242440031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468 (or 1461 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1242440031 is about 35248.2628082577. The cubic root of 1242440031 is about 1075.0412909325.

Adding to 1242440031 its reverse (1300442421), we get a palindrome (2542882452).

The spelling of 1242440031 in words is "one billion, two hundred forty-two million, four hundred forty thousand, thirty-one".