25998749 has 8 divisors (see below), whose sum is σ = 30200448. Its totient is φ = 21918960.

The previous prime is 25998737. The next prime is 25998757. The reversal of 25998749 is 94789952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25998749 - 2⁴ = 25998733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25998749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25998799) 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, 30017 + ... + 30870.

It is an arithmetic number, because the mean of its divisors is an integer number (3775056).

Almost surely, 2^25998749 is an apocalyptic number.

It is an amenable number.

25998749 is a deficient number, since it is larger than the sum of its proper divisors (4201699).

25998749 is an equidigital number, since it uses as much as digits as its factorization.

25998749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60955.

The product of its digits is 1632960, while the sum is 53.

The square root of 25998749 is about 5098.8968414746. The cubic root of 25998749 is about 296.2448553766.

The spelling of 25998749 in words is "twenty-five million, nine hundred ninety-eight thousand, seven hundred forty-nine".