126216424 has 8 divisors (see below), whose sum is σ = 236655810. Its totient is φ = 63108208.

The previous prime is 126216413. The next prime is 126216427. The reversal of 126216424 is 424612621.

It can be written as a sum of positive squares in only one way, i.e., 104407524 + 21808900 = 10218^2 + 4670^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 126216392 and 126216401.

It is not an unprimeable number, because it can be changed into a prime (126216427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7888519 + ... + 7888534.

Almost surely, 2^126216424 is an apocalyptic number.

It is an amenable number.

126216424 is a deficient number, since it is larger than the sum of its proper divisors (110439386).

126216424 is a wasteful number, since it uses less digits than its factorization.

126216424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15777059 (or 15777055 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 126216424 is about 11234.6083153798. The cubic root of 126216424 is about 501.6166658162.

The spelling of 126216424 in words is "one hundred twenty-six million, two hundred sixteen thousand, four hundred twenty-four".