25401613 has 4 divisors (see below), whose sum is σ = 26738560. Its totient is φ = 24064668.

The previous prime is 25401611. The next prime is 25401631. The reversal of 25401613 is 31610452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25401613 - 2¹ = 25401611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25401611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668445 + ... + 668482.

It is an arithmetic number, because the mean of its divisors is an integer number (6684640).

Almost surely, 2^25401613 is an apocalyptic number.

It is an amenable number.

25401613 is a deficient number, since it is larger than the sum of its proper divisors (1336947).

25401613 is a wasteful number, since it uses less digits than its factorization.

25401613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336946.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 25401613 is about 5040.0012896824. The cubic root of 25401613 is about 293.9592281529.

The spelling of 25401613 in words is "twenty-five million, four hundred one thousand, six hundred thirteen".