25869037 has 4 divisors (see below), whose sum is σ = 25879420. Its totient is φ = 25858656.

The previous prime is 25869023. The next prime is 25869049. The reversal of 25869037 is 73096852.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4901796 + 20967241 = 2214^2 + 4579^2 .

It is a 3-Lehmer number, since φ(25869037) divides (25869037-1)³.

It is a cyclic number.

It is not a de Polignac number, because 25869037 - 2¹⁵ = 25836269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25869017) 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, 1039 + ... + 7267.

It is an arithmetic number, because the mean of its divisors is an integer number (6469855).

Almost surely, 2^25869037 is an apocalyptic number.

25869037 is the 4153-rd pentagonal number.

It is an amenable number.

25869037 is a deficient number, since it is larger than the sum of its proper divisors (10383).

25869037 is an equidigital number, since it uses as much as digits as its factorization.

25869037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10382.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 25869037 is about 5086.1613226480. The cubic root of 25869037 is about 295.7513624553.

The spelling of 25869037 in words is "twenty-five million, eight hundred sixty-nine thousand, thirty-seven".