61421936 has 40 divisors (see below), whose sum is σ = 123169200. Its totient is φ = 29652480.

The previous prime is 61421911. The next prime is 61421939. The reversal of 61421936 is 63912416.

61421936 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61421939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71075 + ... + 71933.

It is an arithmetic number, because the mean of its divisors is an integer number (3079230).

Almost surely, 2^61421936 is an apocalyptic number.

It is an amenable number.

61421936 is an abundant number, since it is smaller than the sum of its proper divisors (61747264).

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

61421936 is a wasteful number, since it uses less digits than its factorization.

61421936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017 (or 1011 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The square root of 61421936 is about 7837.2148113982. The cubic root of 61421936 is about 394.5552565269. Note that the first 3 decimals are identical.

The spelling of 61421936 in words is "sixty-one million, four hundred twenty-one thousand, nine hundred thirty-six".