61621074 has 20 divisors (see below), whose sum is σ = 138077214. Its totient is φ = 20540304.

The previous prime is 61621061. The next prime is 61621081. The reversal of 61621074 is 47012616.

It can be written as a sum of positive squares in only one way, i.e., 39125025 + 22496049 = 6255^2 + 4743^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 190027 + ... + 190350.

Almost surely, 2^61621074 is an apocalyptic number.

61621074 is an abundant number, since it is smaller than the sum of its proper divisors (76456140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61621074 is a wasteful number, since it uses less digits than its factorization.

61621074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380391 (or 380382 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 61621074 is about 7849.9091714491. The cubic root of 61621074 is about 394.9811965626.

The spelling of 61621074 in words is "sixty-one million, six hundred twenty-one thousand, seventy-four".