87256441 has 2 divisors, whose sum is σ = 87256442. Its totient is φ = 87256440.

The previous prime is 87256439. The next prime is 87256451. The reversal of 87256441 is 14465278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85285225 + 1971216 = 9235^2 + 1404^2 .

It is a cyclic number.

It is not a de Polignac number, because 87256441 - 2¹ = 87256439 is a prime.

It is a super-2 number, since 2×87256441² = 15227372991972962, which contains 22 as substring.

Together with 87256439, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 87256441.

It is not a weakly prime, because it can be changed into another prime (87256451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43628220 + 43628221.

It is an arithmetic number, because the mean of its divisors is an integer number (43628221).

Almost surely, 2^87256441 is an apocalyptic number.

It is an amenable number.

87256441 is a deficient number, since it is larger than the sum of its proper divisors (1).

87256441 is an equidigital number, since it uses as much as digits as its factorization.

87256441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 37.

The square root of 87256441 is about 9341.1156185972. The cubic root of 87256441 is about 443.5396999678.

The spelling of 87256441 in words is "eighty-seven million, two hundred fifty-six thousand, four hundred forty-one".