25142731 has 2 divisors, whose sum is σ = 25142732. Its totient is φ = 25142730.

The previous prime is 25142693. The next prime is 25142771. The reversal of 25142731 is 13724152.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25142731 - 2¹³ = 25134539 is a prime.

It is a super-2 number, since 2×25142731² = 1264313844276722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25142696 and 25142705.

It is not a weakly prime, because it can be changed into another prime (25142771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12571365 + 12571366.

It is an arithmetic number, because the mean of its divisors is an integer number (12571366).

Almost surely, 2^25142731 is an apocalyptic number.

25142731 is a deficient number, since it is larger than the sum of its proper divisors (1).

25142731 is an equidigital number, since it uses as much as digits as its factorization.

25142731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 25.

The square root of 25142731 is about 5014.2527858097. The cubic root of 25142731 is about 292.9571821398.

Adding to 25142731 its reverse (13724152), we get a palindrome (38866883).

The spelling of 25142731 in words is "twenty-five million, one hundred forty-two thousand, seven hundred thirty-one".