126621524 has 12 divisors (see below), whose sum is σ = 221706324. Its totient is φ = 63276864.

The previous prime is 126621499. The next prime is 126621533. The reversal of 126621524 is 425126621.

It can be written as a sum of positive squares in 2 ways, for example, as 18835600 + 107785924 = 4340^2 + 10382^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1142 + ... + 15954.

It is an arithmetic number, because the mean of its divisors is an integer number (18475527).

Almost surely, 2^126621524 is an apocalyptic number.

It is an amenable number.

126621524 is a deficient number, since it is larger than the sum of its proper divisors (95084800).

126621524 is a wasteful number, since it uses less digits than its factorization.

126621524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16954 (or 16952 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 126621524 is about 11252.6229831093. The cubic root of 126621524 is about 502.1527500325.

The spelling of 126621524 in words is "one hundred twenty-six million, six hundred twenty-one thousand, five hundred twenty-four".