61214985 has 48 divisors (see below), whose sum is σ = 114987600. Its totient is φ = 29947392.

The previous prime is 61214971. The next prime is 61215023. The reversal of 61214985 is 58941216.

It can be written as a sum of positive squares in 8 ways, for example, as 23503104 + 37711881 = 4848^2 + 6141^2 .

It is not a de Polignac number, because 61214985 - 2⁶ = 61214921 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 157171 + ... + 157559.

It is an arithmetic number, because the mean of its divisors is an integer number (2395575).

Almost surely, 2^61214985 is an apocalyptic number.

61214985 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61214985 is a deficient number, since it is larger than the sum of its proper divisors (53772615).

61214985 is a wasteful number, since it uses less digits than its factorization.

61214985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682 (or 679 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 61214985 is about 7824.0005751534. Note that the first 3 decimals coincide. The cubic root of 61214985 is about 394.1116284664. Note that the first 3 decimals are identical.

The spelling of 61214985 in words is "sixty-one million, two hundred fourteen thousand, nine hundred eighty-five".