126243904 has 112 divisors (see below), whose sum is σ = 289681920. Its totient is φ = 54190080.

The previous prime is 126243899. The next prime is 126243917. The reversal of 126243904 is 409342621.

It is a happy number.

It is a super-2 number, since 2×126243904² = 31875046594322432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 640734 + ... + 640930.

Almost surely, 2^126243904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126243904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144840960).

126243904 is an abundant number, since it is smaller than the sum of its proper divisors (163438016).

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

126243904 is a wasteful number, since it uses less digits than its factorization.

126243904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 126243904 is about 11235.8312554079. The cubic root of 126243904 is about 501.6530673802.

The spelling of 126243904 in words is "one hundred twenty-six million, two hundred forty-three thousand, nine hundred four".