61142685 has 32 divisors (see below), whose sum is σ = 102961152. Its totient is φ = 30942720.

The previous prime is 61142681. The next prime is 61142699. The reversal of 61142685 is 58624116.

It is not a de Polignac number, because 61142685 - 2² = 61142681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61142681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21412 + ... + 24098.

It is an arithmetic number, because the mean of its divisors is an integer number (3217536).

Almost surely, 2^61142685 is an apocalyptic number.

It is an amenable number.

61142685 is a deficient number, since it is larger than the sum of its proper divisors (41818467).

61142685 is a wasteful number, since it uses less digits than its factorization.

61142685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773.

The product of its digits is 11520, while the sum is 33.

The square root of 61142685 is about 7819.3788116448. The cubic root of 61142685 is about 393.9564077790.

Subtracting from 61142685 its reverse (58624116), we obtain a square (2518569 = 1587²).

The spelling of 61142685 in words is "sixty-one million, one hundred forty-two thousand, six hundred eighty-five".