25401143 has 4 divisors (see below), whose sum is σ = 25601280. Its totient is φ = 25201008.

The previous prime is 25401127. The next prime is 25401149. The reversal of 25401143 is 34110452.

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 25401143 - 2⁴ = 25401127 is a prime.

It is a Duffinian number.

25401143 is a modest number, since divided by 1143 gives 254 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25401149) 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, 99878 + ... + 100131.

It is an arithmetic number, because the mean of its divisors is an integer number (6400320).

Almost surely, 2^25401143 is an apocalyptic number.

25401143 is a deficient number, since it is larger than the sum of its proper divisors (200137).

25401143 is a wasteful number, since it uses less digits than its factorization.

25401143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200136.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 25401143 is about 5039.9546624945. The cubic root of 25401143 is about 293.9574151225.

Adding to 25401143 its reverse (34110452), we get a palindrome (59511595).

The spelling of 25401143 in words is "twenty-five million, four hundred one thousand, one hundred forty-three".