905252287 has 4 divisors (see below), whose sum is σ = 907510176. Its totient is φ = 902994400.

The previous prime is 905252273. The next prime is 905252291. The reversal of 905252287 is 782252509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 782252509 = 1069 ⋅731761.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-905252287 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (905252237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1128343 + ... + 1129144.

It is an arithmetic number, because the mean of its divisors is an integer number (226877544).

Almost surely, 2^905252287 is an apocalyptic number.

905252287 is a deficient number, since it is larger than the sum of its proper divisors (2257889).

905252287 is a wasteful number, since it uses less digits than its factorization.

905252287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257888.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 905252287 is about 30087.4107726139. The cubic root of 905252287 is about 967.3639011152.

The spelling of 905252287 in words is "nine hundred five million, two hundred fifty-two thousand, two hundred eighty-seven".