61405125 has 32 divisors (see below), whose sum is σ = 102685440. Its totient is φ = 32587200.

The previous prime is 61405117. The next prime is 61405133. The reversal of 61405125 is 52150416.

It is an interprime number because it is at equal distance from previous prime (61405117) and next prime (61405133).

It is not a de Polignac number, because 61405125 - 2³ = 61405117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61405095 and 61405104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139656 + ... + 140094.

It is an arithmetic number, because the mean of its divisors is an integer number (3208920).

Almost surely, 2^61405125 is an apocalyptic number.

It is an amenable number.

61405125 is a deficient number, since it is larger than the sum of its proper divisors (41280315).

61405125 is a wasteful number, since it uses less digits than its factorization.

61405125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 61405125 is about 7836.1422268869. The cubic root of 61405125 is about 394.5192570448.

The spelling of 61405125 in words is "sixty-one million, four hundred five thousand, one hundred twenty-five".