61021017 has 24 divisors (see below), whose sum is σ = 92032200. Its totient is φ = 38911488.

The previous prime is 61020977. The next prime is 61021031. The reversal of 61021017 is 71012016.

It can be written as a sum of positive squares in 4 ways, for example, as 741321 + 60279696 = 861^2 + 7764^2 .

It is not a de Polignac number, because 61021017 - 2⁷ = 61020889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61021717) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28459 + ... + 30527.

It is an arithmetic number, because the mean of its divisors is an integer number (3834675).

Almost surely, 2^61021017 is an apocalyptic number.

It is an amenable number.

61021017 is a deficient number, since it is larger than the sum of its proper divisors (31011183).

61021017 is a wasteful number, since it uses less digits than its factorization.

61021017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217 (or 2214 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 61021017 is about 7811.5950355865. The cubic root of 61021017 is about 393.6949226061.

Subtracting 61021017 from its reverse (71012016), we obtain a palindrome (9990999).

The spelling of 61021017 in words is "sixty-one million, twenty-one thousand, seventeen".