15172261 has 8 divisors (see below), whose sum is σ = 16412760. Its totient is φ = 13942272.

The previous prime is 15172259. The next prime is 15172271. The reversal of 15172261 is 16227151.

15172261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9025 + 15163236 = 95^2 + 3894^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15172261 - 2¹ = 15172259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15172231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525 + ... + 5533.

It is an arithmetic number, because the mean of its divisors is an integer number (2051595).

Almost surely, 2^15172261 is an apocalyptic number.

It is an amenable number.

15172261 is a deficient number, since it is larger than the sum of its proper divisors (1240499).

15172261 is a wasteful number, since it uses less digits than its factorization.

15172261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5255.

The product of its digits is 840, while the sum is 25.

The square root of 15172261 is about 3895.1586617236. The cubic root of 15172261 is about 247.5616878510.

The spelling of 15172261 in words is "fifteen million, one hundred seventy-two thousand, two hundred sixty-one".