126642738 has 32 divisors (see below), whose sum is σ = 265332096. Its totient is φ = 40220928.

The previous prime is 126642713. The next prime is 126642757. The reversal of 126642738 is 837246621.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 126642696 and 126642705.

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 15 ways as a sum of consecutive naturals, for example, 36570 + ... + 39882.

It is an arithmetic number, because the mean of its divisors is an integer number (8291628).

Almost surely, 2^126642738 is an apocalyptic number.

126642738 is an abundant number, since it is smaller than the sum of its proper divisors (138689358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126642738 is a wasteful number, since it uses less digits than its factorization.

126642738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3618.

The product of its digits is 96768, while the sum is 39.

The square root of 126642738 is about 11253.5655682988. The cubic root of 126642738 is about 502.1807917989.

The spelling of 126642738 in words is "one hundred twenty-six million, six hundred forty-two thousand, seven hundred thirty-eight".