126642538 has 16 divisors (see below), whose sum is σ = 207697536. Its totient is φ = 57435840.

The previous prime is 126642499. The next prime is 126642553. The reversal of 126642538 is 835246621.

It is a junction number, because it is equal to n+sod(n) for n = 126642497 and 126642506.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3970 + ... + 16402.

It is an arithmetic number, because the mean of its divisors is an integer number (12981096).

Almost surely, 2^126642538 is an apocalyptic number.

126642538 is a deficient number, since it is larger than the sum of its proper divisors (81054998).

126642538 is a wasteful number, since it uses less digits than its factorization.

126642538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12909.

The product of its digits is 69120, while the sum is 37.

The square root of 126642538 is about 11253.5566822227. The cubic root of 126642538 is about 502.1805274431.

The spelling of 126642538 in words is "one hundred twenty-six million, six hundred forty-two thousand, five hundred thirty-eight".