1242431240 has 32 divisors (see below), whose sum is σ = 2797525080. Its totient is φ = 496607232.

The previous prime is 1242431231. The next prime is 1242431243. The reversal of 1242431240 is 421342421.

It can be written as a sum of positive squares in 4 ways, for example, as 1043677636 + 198753604 = 32306^2 + 14098^2 .

It is a super-2 number, since 2×1242431240² = 3087270772255875200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1242431243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47432 + ... + 68808.

Almost surely, 2^1242431240 is an apocalyptic number.

1242431240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242431240 is an abundant number, since it is smaller than the sum of its proper divisors (1555093840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242431240 is a wasteful number, since it uses less digits than its factorization.

1242431240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22841 (or 22837 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1242431240 is about 35248.1381068561. The cubic root of 1242431240 is about 1075.0387554083.

Adding to 1242431240 its reverse (421342421), we get a palindrome (1663773661).

The spelling of 1242431240 in words is "one billion, two hundred forty-two million, four hundred thirty-one thousand, two hundred forty".