25450121 has 4 divisors (see below), whose sum is σ = 26556672. Its totient is φ = 24343572.

The previous prime is 25450093. The next prime is 25450141. The reversal of 25450121 is 12105452.

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 a de Polignac number, because none of the positive numbers 2^k-25450121 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25450093 and 25450102.

It is not an unprimeable number, because it can be changed into a prime (25450141) 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, 553241 + ... + 553286.

It is an arithmetic number, because the mean of its divisors is an integer number (6639168).

Almost surely, 2^25450121 is an apocalyptic number.

It is an amenable number.

25450121 is a deficient number, since it is larger than the sum of its proper divisors (1106551).

25450121 is a wasteful number, since it uses less digits than its factorization.

25450121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106550.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 25450121 is about 5044.8112947860. The cubic root of 25450121 is about 294.1462281817.

Adding to 25450121 its reverse (12105452), we get a palindrome (37555573).

The spelling of 25450121 in words is "twenty-five million, four hundred fifty thousand, one hundred twenty-one".