126165557 has 16 divisors (see below), whose sum is σ = 150822912. Its totient is φ = 103189680.

The previous prime is 126165553. The next prime is 126165563. The reversal of 126165557 is 755561621.

It is a cyclic number.

It is not a de Polignac number, because 126165557 - 2² = 126165553 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126165557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126165553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97082 + ... + 98372.

It is an arithmetic number, because the mean of its divisors is an integer number (9426432).

Almost surely, 2^126165557 is an apocalyptic number.

It is an amenable number.

126165557 is a deficient number, since it is larger than the sum of its proper divisors (24657355).

126165557 is a wasteful number, since it uses less digits than its factorization.

126165557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928.

The product of its digits is 63000, while the sum is 38.

The square root of 126165557 is about 11232.3442343974. The cubic root of 126165557 is about 501.5492705633.

The spelling of 126165557 in words is "one hundred twenty-six million, one hundred sixty-five thousand, five hundred fifty-seven".