25742989 has 4 divisors (see below), whose sum is σ = 26573440. Its totient is φ = 24912540.

The previous prime is 25742987. The next prime is 25742993. The reversal of 25742989 is 98924752.

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 not a de Polignac number, because 25742989 - 2¹ = 25742987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25742987) 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, 415179 + ... + 415240.

It is an arithmetic number, because the mean of its divisors is an integer number (6643360).

Almost surely, 2^25742989 is an apocalyptic number.

It is an amenable number.

25742989 is a deficient number, since it is larger than the sum of its proper divisors (830451).

25742989 is an equidigital number, since it uses as much as digits as its factorization.

25742989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830450.

The product of its digits is 362880, while the sum is 46.

The square root of 25742989 is about 5073.7549211605. The cubic root of 25742989 is about 295.2702263929.

The spelling of 25742989 in words is "twenty-five million, seven hundred forty-two thousand, nine hundred eighty-nine".