1242731400 has 96 divisors (see below), whose sum is σ = 4020010560. Its totient is φ = 316983040.

The previous prime is 1242731353. The next prime is 1242731411. The reversal of 1242731400 is 41372421.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31227 + ... + 58826.

It is an arithmetic number, because the mean of its divisors is an integer number (41875110).

Almost surely, 2^1242731400 is an apocalyptic number.

1242731400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242731400 is an abundant number, since it is smaller than the sum of its proper divisors (2777279160).

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

1242731400 is a wasteful number, since it uses less digits than its factorization.

1242731400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90095 (or 90086 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 1242731400 is about 35252.3956632737. The cubic root of 1242731400 is about 1075.1253216074.

The spelling of 1242731400 in words is "one billion, two hundred forty-two million, seven hundred thirty-one thousand, four hundred".