25155001 has 4 divisors (see below), whose sum is σ = 25177972. Its totient is φ = 25132032.

The previous prime is 25154999. The next prime is 25155023. The reversal of 25155001 is 10055152.

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 18498601 + 6656400 = 4301^2 + 2580^2 .

It is a cyclic number.

It is not a de Polignac number, because 25155001 - 2¹ = 25154999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25155001.

It is not an unprimeable number, because it can be changed into a prime (25155061) 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, 9756 + ... + 12061.

It is an arithmetic number, because the mean of its divisors is an integer number (6294493).

Almost surely, 2^25155001 is an apocalyptic number.

It is an amenable number.

25155001 is a deficient number, since it is larger than the sum of its proper divisors (22971).

25155001 is a wasteful number, since it uses less digits than its factorization.

25155001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22970.

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 25155001 is about 5015.4761488816. The cubic root of 25155001 is about 293.0048301067.

The spelling of 25155001 in words is "twenty-five million, one hundred fifty-five thousand, one".