25402501 has 4 divisors (see below), whose sum is σ = 25523104. Its totient is φ = 25281900.

The previous prime is 25402499. The next prime is 25402541. The reversal of 25402501 is 10520452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25402501 - 2¹ = 25402499 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 (25402541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59985 + ... + 60406.

It is an arithmetic number, because the mean of its divisors is an integer number (6380776).

Almost surely, 2^25402501 is an apocalyptic number.

It is an amenable number.

25402501 is a deficient number, since it is larger than the sum of its proper divisors (120603).

25402501 is a wasteful number, since it uses less digits than its factorization.

25402501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120602.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 25402501 is about 5040.0893841280. The cubic root of 25402501 is about 293.9626535621.

Adding to 25402501 its reverse (10520452), we get a palindrome (35922953).

It can be divided in two parts, 2540 and 2501, that added together give a square (5041 = 71²).

The spelling of 25402501 in words is "twenty-five million, four hundred two thousand, five hundred one".