61279975 has 12 divisors (see below), whose sum is σ = 76501800. Its totient is φ = 48692000.

The previous prime is 61279961. The next prime is 61279993. The reversal of 61279975 is 57997216.

It is a happy number.

It is not a de Polignac number, because 61279975 - 2⁵ = 61279943 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4501 + ... + 11950.

It is an arithmetic number, because the mean of its divisors is an integer number (6375150).

Almost surely, 2^61279975 is an apocalyptic number.

61279975 is a deficient number, since it is larger than the sum of its proper divisors (15221825).

61279975 is a wasteful number, since it uses less digits than its factorization.

61279975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16610 (or 16605 counting only the distinct ones).

The product of its digits is 238140, while the sum is 46.

The square root of 61279975 is about 7828.1527195118. The cubic root of 61279975 is about 394.2510510592.

The spelling of 61279975 in words is "sixty-one million, two hundred seventy-nine thousand, nine hundred seventy-five".