25890147 has 12 divisors (see below), whose sum is σ = 38309544. Its totient is φ = 16838880.

The previous prime is 25890143. The next prime is 25890149. The reversal of 25890147 is 74109852.

It is not a de Polignac number, because 25890147 - 2² = 25890143 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (25890143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34713 + ... + 35450.

It is an arithmetic number, because the mean of its divisors is an integer number (3192462).

Almost surely, 2^25890147 is an apocalyptic number.

25890147 is a deficient number, since it is larger than the sum of its proper divisors (12419397).

25890147 is a wasteful number, since it uses less digits than its factorization.

25890147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70210 (or 70207 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 25890147 is about 5088.2361383882. The cubic root of 25890147 is about 295.8317882526.

Adding to 25890147 its reverse (74109852), we get a palindrome (99999999).

The spelling of 25890147 in words is "twenty-five million, eight hundred ninety thousand, one hundred forty-seven".