291074225 has 12 divisors (see below), whose sum is σ = 388696476. Its totient is φ = 214946880.

The previous prime is 291074213. The next prime is 291074239. The reversal of 291074225 is 522470192.

It can be written as a sum of positive squares in 6 ways, for example, as 77651344 + 213422881 = 8812^2 + 14609^2 .

It is not a de Polignac number, because 291074225 - 2⁴ = 291074209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 291074191 and 291074200.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 447482 + ... + 448131.

It is an arithmetic number, because the mean of its divisors is an integer number (32391373).

Almost surely, 2^291074225 is an apocalyptic number.

291074225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

291074225 is a deficient number, since it is larger than the sum of its proper divisors (97622251).

291074225 is a wasteful number, since it uses less digits than its factorization.

291074225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895636 (or 895631 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 291074225 is about 17060.8975437988. The cubic root of 291074225 is about 662.7268761352.

The spelling of 291074225 in words is "two hundred ninety-one million, seventy-four thousand, two hundred twenty-five".