61614021 has 24 divisors (see below), whose sum is σ = 97905024. Its totient is φ = 34345920.

The previous prime is 61613989. The next prime is 61614023. The reversal of 61614021 is 12041616.

It is not a de Polignac number, because 61614021 - 2⁵ = 61613989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61614023) 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, 916 + ... + 11138.

It is an arithmetic number, because the mean of its divisors is an integer number (4079376).

Almost surely, 2^61614021 is an apocalyptic number.

It is an amenable number.

61614021 is a deficient number, since it is larger than the sum of its proper divisors (36291003).

61614021 is a wasteful number, since it uses less digits than its factorization.

61614021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10281 (or 10274 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 61614021 is about 7849.4599177268. The cubic root of 61614021 is about 394.9661264548.

Adding to 61614021 its reverse (12041616), we get a palindrome (73655637).

The spelling of 61614021 in words is "sixty-one million, six hundred fourteen thousand, twenty-one".