61420915 has 8 divisors (see below), whose sum is σ = 78040800. Its totient is φ = 46246272.

The previous prime is 61420873. The next prime is 61420921. The reversal of 61420915 is 51902416.

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

It is a cyclic number.

It is not a de Polignac number, because 61420915 - 2²³ = 53032307 is a prime.

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, 361215 + ... + 361384.

It is an arithmetic number, because the mean of its divisors is an integer number (9755100).

Almost surely, 2^61420915 is an apocalyptic number.

61420915 is a deficient number, since it is larger than the sum of its proper divisors (16619885).

61420915 is a wasteful number, since it uses less digits than its factorization.

61420915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722621.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 61420915 is about 7837.1496731911. The cubic root of 61420915 is about 394.5530703201.

The spelling of 61420915 in words is "sixty-one million, four hundred twenty thousand, nine hundred fifteen".