61421624 has 16 divisors (see below), whose sum is σ = 125635320. Its totient is φ = 27918880.

The previous prime is 61421617. The next prime is 61421627. The reversal of 61421624 is 42612416.

It is a junction number, because it is equal to n+sod(n) for n = 61421593 and 61421602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61421627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348899 + ... + 349074.

Almost surely, 2^61421624 is an apocalyptic number.

It is an amenable number.

61421624 is an abundant number, since it is smaller than the sum of its proper divisors (64213696).

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

61421624 is a wasteful number, since it uses less digits than its factorization.

61421624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697990 (or 697986 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 61421624 is about 7837.1949063424. The cubic root of 61421624 is about 394.5545884623.

The spelling of 61421624 in words is "sixty-one million, four hundred twenty-one thousand, six hundred twenty-four".