25025661 has 12 divisors (see below), whose sum is σ = 36359388. Its totient is φ = 16586304.

The previous prime is 25025629. The next prime is 25025687. The reversal of 25025661 is 16652052.

It can be written as a sum of positive squares in 2 ways, for example, as 14175225 + 10850436 = 3765^2 + 3294^2 .

It is not a de Polignac number, because 25025661 - 2⁵ = 25025629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25025461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6480 + ... + 9593.

It is an arithmetic number, because the mean of its divisors is an integer number (3029949).

Almost surely, 2^25025661 is an apocalyptic number.

It is an amenable number.

25025661 is a deficient number, since it is larger than the sum of its proper divisors (11333727).

25025661 is a wasteful number, since it uses less digits than its factorization.

25025661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16252 (or 16249 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 25025661 is about 5002.5654418508. The cubic root of 25025661 is about 292.5017839032.

The spelling of 25025661 in words is "twenty-five million, twenty-five thousand, six hundred sixty-one".