61305172 has 24 divisors (see below), whose sum is σ = 113318240. Its totient is φ = 28939680.

The previous prime is 61305169. The next prime is 61305187. The reversal of 61305172 is 27150316.

It is a super-2 number, since 2×61305172² = 7516648227899168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23938 + ... + 26374.

Almost surely, 2^61305172 is an apocalyptic number.

It is an amenable number.

61305172 is a deficient number, since it is larger than the sum of its proper divisors (52013068).

61305172 is a wasteful number, since it uses less digits than its factorization.

61305172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791 (or 2789 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 61305172 is about 7829.7619376326. The cubic root of 61305172 is about 394.3050794892.

Adding to 61305172 its reverse (27150316), we get a palindrome (88455488).

The spelling of 61305172 in words is "sixty-one million, three hundred five thousand, one hundred seventy-two".