61212987 has 24 divisors (see below), whose sum is σ = 96864768. Its totient is φ = 36942000.

The previous prime is 61212973. The next prime is 61212989. The reversal of 61212987 is 78921216.

61212987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61212987 - 2⁶ = 61212923 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (61212989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24862 + ... + 27212.

It is an arithmetic number, because the mean of its divisors is an integer number (4036032).

Almost surely, 2^61212987 is an apocalyptic number.

61212987 is a deficient number, since it is larger than the sum of its proper divisors (35651781).

61212987 is a wasteful number, since it uses less digits than its factorization.

61212987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2631 (or 2628 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 61212987 is about 7823.8728900718. The cubic root of 61212987 is about 394.1073406077.

It can be divided in two parts, 612129 and 87, that added together give a palindrome (612216).

The spelling of 61212987 in words is "sixty-one million, two hundred twelve thousand, nine hundred eighty-seven".