25405461 has 32 divisors (see below), whose sum is σ = 39321600. Its totient is φ = 16193520.

The previous prime is 25405441. The next prime is 25405469. The reversal of 25405461 is 16450452.

It is not a de Polignac number, because 25405461 - 2¹⁹ = 24881173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25405469) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106180 + ... + 106418.

It is an arithmetic number, because the mean of its divisors is an integer number (1228800).

Almost surely, 2^25405461 is an apocalyptic number.

It is an amenable number.

25405461 is a deficient number, since it is larger than the sum of its proper divisors (13916139).

25405461 is a wasteful number, since it uses less digits than its factorization.

25405461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 25405461 is about 5040.3830211602. The cubic root of 25405461 is about 293.9740710161.

It can be divided in two parts, 2540 and 5461, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 25405461 in words is "twenty-five million, four hundred five thousand, four hundred sixty-one".