25249001 has 4 divisors (see below), whose sum is σ = 25268100. Its totient is φ = 25229904.

The previous prime is 25248947. The next prime is 25249027. The reversal of 25249001 is 10094252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3168400 + 22080601 = 1780^2 + 4699^2 .

It is a cyclic number.

It is not a de Polignac number, because 25249001 - 2²² = 21054697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25249061) 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, 7406 + ... + 10263.

It is an arithmetic number, because the mean of its divisors is an integer number (6317025).

Almost surely, 2^25249001 is an apocalyptic number.

It is an amenable number.

25249001 is a deficient number, since it is larger than the sum of its proper divisors (19099).

25249001 is a wasteful number, since it uses less digits than its factorization.

25249001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19098.

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

The square root of 25249001 is about 5024.8384053619. The cubic root of 25249001 is about 293.3693463303.

It can be divided in two parts, 25 and 249001, that multiplied together give a square (6225025 = 2495²).

The spelling of 25249001 in words is "twenty-five million, two hundred forty-nine thousand, one".