61387275 has 24 divisors (see below), whose sum is σ = 101761344. Its totient is φ = 32653600.

The previous prime is 61387259. The next prime is 61387283. The reversal of 61387275 is 57278316.

It is not a de Polignac number, because 61387275 - 2⁴ = 61387259 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35992 + ... + 37658.

It is an arithmetic number, because the mean of its divisors is an integer number (4240056).

Almost surely, 2^61387275 is an apocalyptic number.

61387275 is a deficient number, since it is larger than the sum of its proper divisors (40374069).

61387275 is a wasteful number, since it uses less digits than its factorization.

61387275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171 (or 2166 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The square root of 61387275 is about 7835.0031908098. The cubic root of 61387275 is about 394.4810254303.

The spelling of 61387275 in words is "sixty-one million, three hundred eighty-seven thousand, two hundred seventy-five".