126642537 has 24 divisors (see below), whose sum is σ = 221360256. Its totient is φ = 68109696.

The previous prime is 126642499. The next prime is 126642553. The reversal of 126642537 is 735246621.

126642537 is a `hidden beast` number, since 1 + 2 + 6 + 642 + 5 + 3 + 7 = 666.

It is not a de Polignac number, because 126642537 - 2⁶ = 126642473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126642557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58053 + ... + 60194.

It is an arithmetic number, because the mean of its divisors is an integer number (9223344).

Almost surely, 2^126642537 is an apocalyptic number.

126642537 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

126642537 is a deficient number, since it is larger than the sum of its proper divisors (94717719).

126642537 is a wasteful number, since it uses less digits than its factorization.

126642537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118277 (or 118274 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 126642537 is about 11253.5566377923. The cubic root of 126642537 is about 502.1805261214.

The spelling of 126642537 in words is "one hundred twenty-six million, six hundred forty-two thousand, five hundred thirty-seven".