61240015 has 16 divisors (see below), whose sum is σ = 74606400. Its totient is φ = 48252672.

The previous prime is 61239901. The next prime is 61240027. The reversal of 61240015 is 51004216.

It is a cyclic number.

It is not a de Polignac number, because 61240015 - 2¹³ = 61231823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61239974 and 61240001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170406 + ... + 170764.

It is an arithmetic number, because the mean of its divisors is an integer number (4662900).

Almost surely, 2^61240015 is an apocalyptic number.

61240015 is a deficient number, since it is larger than the sum of its proper divisors (13366385).

61240015 is a wasteful number, since it uses less digits than its factorization.

61240015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 61240015 is about 7825.5999769986. The cubic root of 61240015 is about 394.1653368291.

The spelling of 61240015 in words is "sixty-one million, two hundred forty thousand, fifteen".