25490661 has 8 divisors (see below), whose sum is σ = 38842944. Its totient is φ = 14566080.

The previous prime is 25490657. The next prime is 25490671. The reversal of 25490661 is 16609452.

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

It is not a de Polignac number, because 25490661 - 2² = 25490657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25490671) 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 7 ways as a sum of consecutive naturals, for example, 606900 + ... + 606941.

It is an arithmetic number, because the mean of its divisors is an integer number (4855368).

Almost surely, 2^25490661 is an apocalyptic number.

25490661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25490661 is a deficient number, since it is larger than the sum of its proper divisors (13352283).

25490661 is a wasteful number, since it uses less digits than its factorization.

25490661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213851.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 25490661 is about 5048.8276857108. The cubic root of 25490661 is about 294.3023291029.

The spelling of 25490661 in words is "twenty-five million, four hundred ninety thousand, six hundred sixty-one".