25451045 has 4 divisors (see below), whose sum is σ = 30541260. Its totient is φ = 20360832.

The previous prime is 25451011. The next prime is 25451053. The reversal of 25451045 is 54015452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19695844 + 5755201 = 4438^2 + 2399^2 .

It is a cyclic number.

It is not a de Polignac number, because 25451045 - 2¹⁶ = 25385509 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2545100 + ... + 2545109.

It is an arithmetic number, because the mean of its divisors is an integer number (7635315).

Almost surely, 2^25451045 is an apocalyptic number.

It is an amenable number.

25451045 is a deficient number, since it is larger than the sum of its proper divisors (5090215).

25451045 is an equidigital number, since it uses as much as digits as its factorization.

25451045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5090214.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 25451045 is about 5044.9028731979. The cubic root of 25451045 is about 294.1497879268.

Adding to 25451045 its reverse (54015452), we get a palindrome (79466497).

The spelling of 25451045 in words is "twenty-five million, four hundred fifty-one thousand, forty-five".