61415587 has 4 divisors (see below), whose sum is σ = 61431880. Its totient is φ = 61399296.

The previous prime is 61415573. The next prime is 61415603. The reversal of 61415587 is 78551416.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61415587 - 2²³ = 53026979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61415507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 739 + ... + 11107.

It is an arithmetic number, because the mean of its divisors is an integer number (15357970).

Almost surely, 2^61415587 is an apocalyptic number.

61415587 is a deficient number, since it is larger than the sum of its proper divisors (16293).

61415587 is a wasteful number, since it uses less digits than its factorization.

61415587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16292.

The product of its digits is 33600, while the sum is 37.

The square root of 61415587 is about 7836.8097463190. The cubic root of 61415587 is about 394.5416613967.

The spelling of 61415587 in words is "sixty-one million, four hundred fifteen thousand, five hundred eighty-seven".