25770421 has 8 divisors (see below), whose sum is σ = 26205984. Its totient is φ = 25338000.

The previous prime is 25770401. The next prime is 25770431. The reversal of 25770421 is 12407752.

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 25770421 - 2¹¹ = 25768373 is a prime.

It is a super-2 number, since 2×25770421² = 1328229197034482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25770421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25770401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20215 + ... + 21451.

It is an arithmetic number, because the mean of its divisors is an integer number (3275748).

Almost surely, 2^25770421 is an apocalyptic number.

It is an amenable number.

25770421 is a deficient number, since it is larger than the sum of its proper divisors (435563).

25770421 is a wasteful number, since it uses less digits than its factorization.

25770421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 25770421 is about 5076.4575246918. The cubic root of 25770421 is about 295.3750701811.

The spelling of 25770421 in words is "twenty-five million, seven hundred seventy thousand, four hundred twenty-one".