87906245 has 18 divisors (see below), whose sum is σ = 122915142. Its totient is φ = 60177936.

The previous prime is 87906239. The next prime is 87906271. The reversal of 87906245 is 54260978.

87906245 is nontrivially palindromic in base 4.

It can be written as a sum of positive squares in only one way, i.e., 70324996 + 17581249 = 8386^2 + 4193^2 .

It is not a de Polignac number, because 87906245 - 2⁴ = 87906229 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 146456 + ... + 147054.

It is an arithmetic number, because the mean of its divisors is an integer number (6828619).

Almost surely, 2^87906245 is an apocalyptic number.

It is an amenable number.

87906245 is a deficient number, since it is larger than the sum of its proper divisors (35008897).

87906245 is an frugal number, since it uses more digits than its factorization.

87906245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 87906245 is about 9375.8330296566. The cubic root of 87906245 is about 444.6380004277.

The spelling of 87906245 in words is "eighty-seven million, nine hundred six thousand, two hundred forty-five".