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25977 = 371237

25977 has 8 divisors (see below), whose sum is σ = 39616. Its totient is φ = 14832.

The previous prime is 25969. The next prime is 25981. The reversal of 25977 is 77952.

It is a happy number.

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

It is not a de Polignac number, because 25977 - 23 = 25969 is a prime.

It is a Duffinian number.

25977 is a lucky number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (25997) 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, 598 + ... + 639.

It is an arithmetic number, because the mean of its divisors is an integer number (4952).

225977 is an apocalyptic number.

It is an amenable number.

25977 is a deficient number, since it is larger than the sum of its proper divisors (13639).

25977 is a wasteful number, since it uses less digits than its factorization.

25977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247.

The product of its digits is 4410, while the sum is 30.

The square root of 25977 is about 161.1738192139. The cubic root of 25977 is about 29.6162225416.

The spelling of 25977 in words is "twenty-five thousand, nine hundred seventy-seven".

Divisors: 1 3 7 21 1237 3711 8659 25977