61156025 has 24 divisors (see below), whose sum is σ = 89470464. Its totient is φ = 40579200.

The previous prime is 61156013. The next prime is 61156027. The reversal of 61156025 is 52065116.

It is not a de Polignac number, because 61156025 - 2¹² = 61151929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61155985 and 61156003.

It is not an unprimeable number, because it can be changed into a prime (61156027) 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, 212 + ... + 11061.

It is an arithmetic number, because the mean of its divisors is an integer number (3727936).

Almost surely, 2^61156025 is an apocalyptic number.

It is an amenable number.

61156025 is a deficient number, since it is larger than the sum of its proper divisors (28314439).

61156025 is a wasteful number, since it uses less digits than its factorization.

61156025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11321 (or 11316 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 61156025 is about 7820.2317740589. The cubic root of 61156025 is about 393.9850565935.

Subtracting from 61156025 its reverse (52065116), we obtain a palindrome (9090909).

The spelling of 61156025 in words is "sixty-one million, one hundred fifty-six thousand, twenty-five".