25121641 has 8 divisors (see below), whose sum is σ = 25764480. Its totient is φ = 24483408.

The previous prime is 25121633. The next prime is 25121651. The reversal of 25121641 is 14612152.

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 25121641 - 2³ = 25121633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25121611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11650 + ... + 13636.

It is an arithmetic number, because the mean of its divisors is an integer number (3220560).

Almost surely, 2^25121641 is an apocalyptic number.

It is an amenable number.

25121641 is a deficient number, since it is larger than the sum of its proper divisors (642839).

25121641 is a wasteful number, since it uses less digits than its factorization.

25121641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303.

The product of its digits is 480, while the sum is 22.

The square root of 25121641 is about 5012.1493393553. The cubic root of 25121641 is about 292.8752473213.

Adding to 25121641 its reverse (14612152), we get a palindrome (39733793).

The spelling of 25121641 in words is "twenty-five million, one hundred twenty-one thousand, six hundred forty-one".