25091401 has 4 divisors (see below), whose sum is σ = 25236612. Its totient is φ = 24946192.

The previous prime is 25091399. The next prime is 25091411. The reversal of 25091401 is 10419052.

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 21631801 + 3459600 = 4651^2 + 1860^2 .

It is a cyclic number.

It is not a de Polignac number, because 25091401 - 2¹ = 25091399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25091411) 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, 72346 + ... + 72691.

It is an arithmetic number, because the mean of its divisors is an integer number (6309153).

Almost surely, 2^25091401 is an apocalyptic number.

It is an amenable number.

25091401 is a deficient number, since it is larger than the sum of its proper divisors (145211).

25091401 is a wasteful number, since it uses less digits than its factorization.

25091401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145210.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 25091401 is about 5009.1317610939. The cubic root of 25091401 is about 292.7576846254.

The spelling of 25091401 in words is "twenty-five million, ninety-one thousand, four hundred one".