291425 has 6 divisors (see below), whose sum is σ = 361398. Its totient is φ = 233120.

The previous prime is 291419. The next prime is 291437. The reversal of 291425 is 524192.

291425 = T₈₂ + T₈₃ + ... + T₁₃₁.

It can be written as a sum of positive squares in 3 ways, for example, as 38416 + 253009 = 196^2 + 503^2 .

It is not a de Polignac number, because 291425 - 2⁸ = 291169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 291425.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 291425.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5804 + ... + 5853.

It is an arithmetic number, because the mean of its divisors is an integer number (60233).

2²⁹¹⁴²⁵ is an apocalyptic number.

291425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

291425 is a deficient number, since it is larger than the sum of its proper divisors (69973).

291425 is a wasteful number, since it uses less digits than its factorization.

291425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11667 (or 11662 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 291425 is about 539.8379386446. The cubic root of 291425 is about 66.2992987754.

The spelling of 291425 in words is "two hundred ninety-one thousand, four hundred twenty-five".