61428715 has 8 divisors (see below), whose sum is σ = 74603088. Its totient is φ = 48550560.

The previous prime is 61428673. The next prime is 61428739. The reversal of 61428715 is 51782416.

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

It is not a de Polignac number, because 61428715 - 2²³ = 53040107 is a prime.

It is a Duffinian 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, 73596 + ... + 74425.

It is an arithmetic number, because the mean of its divisors is an integer number (9325386).

Almost surely, 2^61428715 is an apocalyptic number.

61428715 is a deficient number, since it is larger than the sum of its proper divisors (13174373).

61428715 is a wasteful number, since it uses less digits than its factorization.

61428715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148109.

The product of its digits is 13440, while the sum is 34.

The square root of 61428715 is about 7837.6472872923. The cubic root of 61428715 is about 394.5697713830.

The spelling of 61428715 in words is "sixty-one million, four hundred twenty-eight thousand, seven hundred fifteen".