126701561 has 16 divisors (see below), whose sum is σ = 153633024. Its totient is φ = 102004224.

The previous prime is 126701483. The next prime is 126701563. The reversal of 126701561 is 165107621.

It is not a de Polignac number, because 126701561 - 2¹⁴ = 126685177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126701563) 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, 87701 + ... + 89133.

It is an arithmetic number, because the mean of its divisors is an integer number (9602064).

Almost surely, 2^126701561 is an apocalyptic number.

It is an amenable number.

126701561 is a deficient number, since it is larger than the sum of its proper divisors (26931463).

126701561 is a wasteful number, since it uses less digits than its factorization.

126701561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 126701561 is about 11256.1787921124. The cubic root of 126701561 is about 502.2585307171.

The spelling of 126701561 in words is "one hundred twenty-six million, seven hundred one thousand, five hundred sixty-one".