25491369 has 8 divisors (see below), whose sum is σ = 35777440. Its totient is φ = 16099776.

The previous prime is 25491329. The next prime is 25491371. The reversal of 25491369 is 96319452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25491369 - 2⁷ = 25491241 is a prime.

It is a super-2 number, since 2×25491369² = 1299619786988322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25491329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223552 + ... + 223665.

It is an arithmetic number, because the mean of its divisors is an integer number (4472180).

Almost surely, 2^25491369 is an apocalyptic number.

It is an amenable number.

25491369 is a deficient number, since it is larger than the sum of its proper divisors (10286071).

25491369 is a wasteful number, since it uses less digits than its factorization.

25491369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447239.

The product of its digits is 58320, while the sum is 39.

The square root of 25491369 is about 5048.8978005105. The cubic root of 25491369 is about 294.3050538148.

The spelling of 25491369 in words is "twenty-five million, four hundred ninety-one thousand, three hundred sixty-nine".