25142247 has 12 divisors (see below), whose sum is σ = 39110344. Its totient is φ = 15472080.

The previous prime is 25142239. The next prime is 25142251. The reversal of 25142247 is 74224152.

It is not a de Polignac number, because 25142247 - 2³ = 25142239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25142247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25142207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107329 + ... + 107562.

Almost surely, 2^25142247 is an apocalyptic number.

25142247 is a deficient number, since it is larger than the sum of its proper divisors (13968097).

25142247 is a wasteful number, since it uses less digits than its factorization.

25142247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214910 (or 214907 counting only the distinct ones).

The product of its digits is 4480, while the sum is 27.

The square root of 25142247 is about 5014.2045231522. The cubic root of 25142247 is about 292.9553023097.

Adding to 25142247 its reverse (74224152), we get a palindrome (99366399).

It can be divided in two parts, 2514 and 2247, that added together give a square (4761 = 69²).

The spelling of 25142247 in words is "twenty-five million, one hundred forty-two thousand, two hundred forty-seven".