61285869 has 16 divisors (see below), whose sum is σ = 94742400. Its totient is φ = 39080448.

The previous prime is 61285859. The next prime is 61285871. The reversal of 61285869 is 96858216.

61285869 is a `hidden beast` number, since 61 + 2 + 8 + 586 + 9 = 666.

It is not a de Polignac number, because 61285869 - 2¹¹ = 61283821 is a prime.

It is a super-2 number, since 2×61285869² = 7511915478170322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61285859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48724 + ... + 49965.

It is an arithmetic number, because the mean of its divisors is an integer number (5921400).

Almost surely, 2^61285869 is an apocalyptic number.

61285869 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

61285869 is a deficient number, since it is larger than the sum of its proper divisors (33456531).

61285869 is a wasteful number, since it uses less digits than its factorization.

61285869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98721 (or 98715 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 61285869 is about 7828.5291722009. The cubic root of 61285869 is about 394.2636905400.

The spelling of 61285869 in words is "sixty-one million, two hundred eighty-five thousand, eight hundred sixty-nine".