61214975 has 12 divisors (see below), whose sum is σ = 76158816. Its totient is φ = 48809280.

The previous prime is 61214971. The next prime is 61215023. The reversal of 61214975 is 57941216.

It is a Cunningham number, because it is equal to 7824²-1.

It is not a de Polignac number, because 61214975 - 2² = 61214971 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61214971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3914 + ... + 11736.

It is an arithmetic number, because the mean of its divisors is an integer number (6346568).

Almost surely, 2^61214975 is an apocalyptic number.

61214975 is a deficient number, since it is larger than the sum of its proper divisors (14943841).

61214975 is a wasteful number, since it uses less digits than its factorization.

61214975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8146 (or 8141 counting only the distinct ones).

The product of its digits is 15120, while the sum is 35.

The square root of 61214975 is about 7823.9999360941. Note that the first 4 decimals coincide. The cubic root of 61214975 is about 394.1116070058. Note that the first 3 decimals are identical.

The spelling of 61214975 in words is "sixty-one million, two hundred fourteen thousand, nine hundred seventy-five".