61285621 has 8 divisors (see below), whose sum is σ = 66012320. Its totient is φ = 56709072.

The previous prime is 61285619. The next prime is 61285669. The reversal of 61285621 is 12658216.

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

It is not a de Polignac number, because 61285621 - 2¹ = 61285619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61285681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36690 + ... + 38323.

It is an arithmetic number, because the mean of its divisors is an integer number (8251540).

Almost surely, 2^61285621 is an apocalyptic number.

It is an amenable number.

61285621 is a deficient number, since it is larger than the sum of its proper divisors (4726699).

61285621 is a wasteful number, since it uses less digits than its factorization.

61285621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75075.

The product of its digits is 5760, while the sum is 31.

The square root of 61285621 is about 7828.5133326833. The cubic root of 61285621 is about 394.2631587289.

The spelling of 61285621 in words is "sixty-one million, two hundred eighty-five thousand, six hundred twenty-one".