25142021 has 2 divisors, whose sum is σ = 25142022. Its totient is φ = 25142020.

The previous prime is 25142009. The next prime is 25142027. The reversal of 25142021 is 12024152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23668225 + 1473796 = 4865^2 + 1214^2 .

It is a cyclic number.

It is not a de Polignac number, because 25142021 - 2⁶ = 25141957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25142027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12571010 + 12571011.

It is an arithmetic number, because the mean of its divisors is an integer number (12571011).

Almost surely, 2^25142021 is an apocalyptic number.

It is an amenable number.

25142021 is a deficient number, since it is larger than the sum of its proper divisors (1).

25142021 is an equidigital number, since it uses as much as digits as its factorization.

25142021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 25142021 is about 5014.1819871241. The cubic root of 25142021 is about 292.9544245295.

Adding to 25142021 its reverse (12024152), we get a palindrome (37166173).

The spelling of 25142021 in words is "twenty-five million, one hundred forty-two thousand, twenty-one".