1242412440 has 64 divisors (see below), whose sum is σ = 3737525760. Its totient is φ = 330395520.

The previous prime is 1242412427. The next prime is 1242412517. The reversal of 1242412440 is 442142421.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1242412440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29935 + ... + 58145.

It is an arithmetic number, because the mean of its divisors is an integer number (58398840).

Almost surely, 2^1242412440 is an apocalyptic number.

1242412440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242412440 is an abundant number, since it is smaller than the sum of its proper divisors (2495113320).

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

1242412440 is a wasteful number, since it uses less digits than its factorization.

1242412440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28592 (or 28588 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 1242412440 is about 35247.8714250946. The cubic root of 1242412440 is about 1075.0333330209.

Adding to 1242412440 its reverse (442142421), we get a palindrome (1684554861).

The spelling of 1242412440 in words is "one billion, two hundred forty-two million, four hundred twelve thousand, four hundred forty".