61261587 has 12 divisors (see below), whose sum is σ = 90159264. Its totient is φ = 40070160.

The previous prime is 61261583. The next prime is 61261621. The reversal of 61261587 is 78516216.

61261587 is a `hidden beast` number, since 6 + 12 + 61 + 587 = 666.

It is not a de Polignac number, because 61261587 - 2² = 61261583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61261583) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63739 + ... + 64692.

It is an arithmetic number, because the mean of its divisors is an integer number (7513272).

Almost surely, 2^61261587 is an apocalyptic number.

61261587 is a deficient number, since it is larger than the sum of its proper divisors (28897677).

61261587 is a wasteful number, since it uses less digits than its factorization.

61261587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128490 (or 128487 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 61261587 is about 7826.9781525184. The cubic root of 61261587 is about 394.2116134150.

The spelling of 61261587 in words is "sixty-one million, two hundred sixty-one thousand, five hundred eighty-seven".