61547420 has 24 divisors (see below), whose sum is σ = 141000048. Its totient is φ = 22380800.

The previous prime is 61547419. The next prime is 61547467. The reversal of 61547420 is 2474516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139661 + ... + 140100.

It is an arithmetic number, because the mean of its divisors is an integer number (5875002).

Almost surely, 2^61547420 is an apocalyptic number.

It is an amenable number.

61547420 is an abundant number, since it is smaller than the sum of its proper divisors (79452628).

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

61547420 is a wasteful number, since it uses less digits than its factorization.

61547420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279781 (or 279779 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 61547420 is about 7845.2163768758. The cubic root of 61547420 is about 394.8237637137.

The spelling of 61547420 in words is "sixty-one million, five hundred forty-seven thousand, four hundred twenty".