25187961 has 8 divisors (see below), whose sum is σ = 33674080. Its totient is φ = 16746912.

The previous prime is 25187959. The next prime is 25187963. The reversal of 25187961 is 16978152.

It is an interprime number because it is at equal distance from previous prime (25187959) and next prime (25187963).

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

It is not a de Polignac number, because 25187961 - 2¹ = 25187959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25187963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9940 + ... + 12213.

It is an arithmetic number, because the mean of its divisors is an integer number (4209260).

Almost surely, 2^25187961 is an apocalyptic number.

It is an amenable number.

25187961 is a deficient number, since it is larger than the sum of its proper divisors (8486119).

25187961 is a wasteful number, since it uses less digits than its factorization.

25187961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22535.

The product of its digits is 30240, while the sum is 39.

The square root of 25187961 is about 5018.7609028524. The cubic root of 25187961 is about 293.1327466762.

The spelling of 25187961 in words is "twenty-five million, one hundred eighty-seven thousand, nine hundred sixty-one".