126243972 has 36 divisors (see below), whose sum is σ = 337889916. Its totient is φ = 39605760.

The previous prime is 126243967. The next prime is 126243977. The reversal of 126243972 is 279342621.

126243972 is a `hidden beast` number, since 1 + 262 + 4 + 397 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (126243967) and next prime (126243977).

It can be written as a sum of positive squares in 2 ways, for example, as 40755456 + 85488516 = 6384^2 + 9246^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (126243977) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 102529 + ... + 103752.

It is an arithmetic number, because the mean of its divisors is an integer number (9385831).

Almost surely, 2^126243972 is an apocalyptic number.

126243972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

126243972 is an abundant number, since it is smaller than the sum of its proper divisors (211645944).

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

126243972 is a wasteful number, since it uses less digits than its factorization.

126243972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206308 (or 206303 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 126243972 is about 11235.8342814408. The cubic root of 126243972 is about 501.6531574503.

The spelling of 126243972 in words is "one hundred twenty-six million, two hundred forty-three thousand, nine hundred seventy-two".