25243534 has 4 divisors (see below), whose sum is σ = 37865304. Its totient is φ = 12621766.

The previous prime is 25243531. The next prime is 25243541. The reversal of 25243534 is 43534252.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25243531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6310882 + ... + 6310885.

It is an arithmetic number, because the mean of its divisors is an integer number (9466326).

Almost surely, 2^25243534 is an apocalyptic number.

25243534 is a deficient number, since it is larger than the sum of its proper divisors (12621770).

25243534 is a wasteful number, since it uses less digits than its factorization.

25243534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12621769.

The product of its digits is 14400, while the sum is 28.

The square root of 25243534 is about 5024.2943783182. The cubic root of 25243534 is about 293.3481710240.

Adding to 25243534 its reverse (43534252), we get a palindrome (68777786).

The spelling of 25243534 in words is "twenty-five million, two hundred forty-three thousand, five hundred thirty-four".