126642536 has 16 divisors (see below), whose sum is σ = 245643300. Its totient is φ = 61137664.

The previous prime is 126642499. The next prime is 126642553. The reversal of 126642536 is 635246621.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 112996900 + 13645636 = 10630^2 + 3694^2 .

It is a super-2 number, since 2×126642536² = 32076663849022592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 126642496 and 126642505.

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, 272705 + ... + 273168.

Almost surely, 2^126642536 is an apocalyptic number.

It is an amenable number.

126642536 is a deficient number, since it is larger than the sum of its proper divisors (119000764).

126642536 is a wasteful number, since it uses less digits than its factorization.

126642536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545908 (or 545904 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

The square root of 126642536 is about 11253.5565933619. The cubic root of 126642536 is about 502.1805247996.

The spelling of 126642536 in words is "one hundred twenty-six million, six hundred forty-two thousand, five hundred thirty-six".