25201945 has 4 divisors (see below), whose sum is σ = 30242340. Its totient is φ = 20161552.

The previous prime is 25201927. The next prime is 25201949. The reversal of 25201945 is 54910252.

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 11923209 + 13278736 = 3453^2 + 3644^2 .

It is a cyclic number.

It is not a de Polignac number, because 25201945 - 2¹¹ = 25199897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25201949) 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, 2520190 + ... + 2520199.

It is an arithmetic number, because the mean of its divisors is an integer number (7560585).

Almost surely, 2^25201945 is an apocalyptic number.

It is an amenable number.

25201945 is a deficient number, since it is larger than the sum of its proper divisors (5040395).

25201945 is an equidigital number, since it uses as much as digits as its factorization.

25201945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5040394.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 25201945 is about 5020.1538821036. The cubic root of 25201945 is about 293.1869843596.

It can be divided in two parts, 2520 and 1945, that added together give a triangular number (4465 = T₉₄).

The spelling of 25201945 in words is "twenty-five million, two hundred one thousand, nine hundred forty-five".