25211145 has 8 divisors (see below), whose sum is σ = 40337856. Its totient is φ = 13445936.

The previous prime is 25211143. The next prime is 25211149. The reversal of 25211145 is 54111252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25211145 - 2¹ = 25211143 is a prime.

It is a super-2 number, since 2×25211145² = 1271203664422050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25211143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 840357 + ... + 840386.

It is an arithmetic number, because the mean of its divisors is an integer number (5042232).

Almost surely, 2^25211145 is an apocalyptic number.

It is an amenable number.

25211145 is a deficient number, since it is larger than the sum of its proper divisors (15126711).

25211145 is a wasteful number, since it uses less digits than its factorization.

25211145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680751.

The product of its digits is 400, while the sum is 21.

The square root of 25211145 is about 5021.0701050672. The cubic root of 25211145 is about 293.2226561050. Note that the first 3 decimals are identical.

Adding to 25211145 its reverse (54111252), we get a palindrome (79322397).

The spelling of 25211145 in words is "twenty-five million, two hundred eleven thousand, one hundred forty-five".