25418949 has 4 divisors (see below), whose sum is σ = 33891936. Its totient is φ = 16945964.

The previous prime is 25418917. The next prime is 25418957. The reversal of 25418949 is 94981452.

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 25418949 - 2⁵ = 25418917 is a prime.

It is a super-2 number, since 2×25418949² = 1292245936529202, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 25418949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25418969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4236489 + ... + 4236494.

It is an arithmetic number, because the mean of its divisors is an integer number (8472984).

Almost surely, 2^25418949 is an apocalyptic number.

It is an amenable number.

25418949 is a deficient number, since it is larger than the sum of its proper divisors (8472987).

25418949 is an equidigital number, since it uses as much as digits as its factorization.

25418949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8472986.

The product of its digits is 103680, while the sum is 42.

The square root of 25418949 is about 5041.7208371745. The cubic root of 25418949 is about 294.0260863521.

The spelling of 25418949 in words is "twenty-five million, four hundred eighteen thousand, nine hundred forty-nine".