25977143 has 4 divisors (see below), whose sum is σ = 27106608. Its totient is φ = 24847680.

The previous prime is 25977137. The next prime is 25977151. The reversal of 25977143 is 34177952.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25977143 - 2⁶ = 25977079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25977097 and 25977106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25977103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564698 + ... + 564743.

It is an arithmetic number, because the mean of its divisors is an integer number (6776652).

Almost surely, 2^25977143 is an apocalyptic number.

25977143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

25977143 is a deficient number, since it is larger than the sum of its proper divisors (1129465).

25977143 is a wasteful number, since it uses less digits than its factorization.

25977143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129464.

The product of its digits is 52920, while the sum is 38.

The square root of 25977143 is about 5096.7777075325. Note that the first 4 decimals coincide. The cubic root of 25977143 is about 296.1627688599.

The spelling of 25977143 in words is "twenty-five million, nine hundred seventy-seven thousand, one hundred forty-three".