172426761 has 24 divisors (see below), whose sum is σ = 269123400. Its totient is φ = 105751296.

The previous prime is 172426753. The next prime is 172426763. The reversal of 172426761 is 167624271.

172426761 is a `hidden beast` number, since 172 + 426 + 7 + 61 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 10017225 + 162409536 = 3165^2 + 12744^2 .

It is not a de Polignac number, because 172426761 - 2³ = 172426753 is a prime.

It is a super-2 number, since 2×172426761² = 59461975817902242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172426763) 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, 34765 + ... + 39413.

It is an arithmetic number, because the mean of its divisors is an integer number (11213475).

Almost surely, 2^172426761 is an apocalyptic number.

It is an amenable number.

172426761 is a deficient number, since it is larger than the sum of its proper divisors (96696639).

172426761 is a wasteful number, since it uses less digits than its factorization.

172426761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4985 (or 4982 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 172426761 is about 13131.1370794764. The cubic root of 172426761 is about 556.5893473513.

The spelling of 172426761 in words is "one hundred seventy-two million, four hundred twenty-six thousand, seven hundred sixty-one".