61568421 has 8 divisors (see below), whose sum is σ = 84922080. Its totient is φ = 39630192.

The previous prime is 61568371. The next prime is 61568443. The reversal of 61568421 is 12486516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61568421 - 2¹⁴ = 61552037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61568461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353755 + ... + 353928.

It is an arithmetic number, because the mean of its divisors is an integer number (10615260).

Almost surely, 2^61568421 is an apocalyptic number.

It is an amenable number.

61568421 is a deficient number, since it is larger than the sum of its proper divisors (23353659).

61568421 is a wasteful number, since it uses less digits than its factorization.

61568421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707715.

The product of its digits is 11520, while the sum is 33.

The square root of 61568421 is about 7846.5547216597. The cubic root of 61568421 is about 394.8686654115.

The spelling of 61568421 in words is "sixty-one million, five hundred sixty-eight thousand, four hundred twenty-one".