61974861 has 16 divisors (see below), whose sum is σ = 90671616. Its totient is φ = 37417536.

The previous prime is 61974853. The next prime is 61974863. The reversal of 61974861 is 16847916.

It is not a de Polignac number, because 61974861 - 2³ = 61974853 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61974863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12925 + ... + 17058.

It is an arithmetic number, because the mean of its divisors is an integer number (5666976).

Almost surely, 2^61974861 is an apocalyptic number.

It is an amenable number.

61974861 is a deficient number, since it is larger than the sum of its proper divisors (28696755).

61974861 is a wasteful number, since it uses less digits than its factorization.

61974861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30052.

The product of its digits is 72576, while the sum is 42.

The square root of 61974861 is about 7872.4113840678. The cubic root of 61974861 is about 395.7356604907.

It can be divided in two parts, 61974 and 861, that added together give a triangular number (62835 = T₃₅₄).

The spelling of 61974861 in words is "sixty-one million, nine hundred seventy-four thousand, eight hundred sixty-one".