61173261 has 24 divisors (see below), whose sum is σ = 95187456. Its totient is φ = 37746720.

The previous prime is 61173257. The next prime is 61173283. The reversal of 61173261 is 16237116.

It is not a de Polignac number, because 61173261 - 2² = 61173257 is a prime.

It is a super-2 number, since 2×61173261² = 7484335722748242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61173221) 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, 1651 + ... + 11183.

It is an arithmetic number, because the mean of its divisors is an integer number (3966144).

Almost surely, 2^61173261 is an apocalyptic number.

It is an amenable number.

61173261 is a deficient number, since it is larger than the sum of its proper divisors (34014195).

61173261 is a wasteful number, since it uses less digits than its factorization.

61173261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9593 (or 9590 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 61173261 is about 7821.3337097966. Note that the first 3 decimals coincide. The cubic root of 61173261 is about 394.0220662399.

The spelling of 61173261 in words is "sixty-one million, one hundred seventy-three thousand, two hundred sixty-one".