25135043 has 4 divisors (see below), whose sum is σ = 26457960. Its totient is φ = 23812128.

The previous prime is 25135037. The next prime is 25135063. The reversal of 25135043 is 34053152.

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 25135043 - 2¹⁴ = 25118659 is a prime.

It is a super-2 number, since 2×25135043² = 1263540773223698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25135063) 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, 661430 + ... + 661467.

It is an arithmetic number, because the mean of its divisors is an integer number (6614490).

Almost surely, 2^25135043 is an apocalyptic number.

25135043 is a deficient number, since it is larger than the sum of its proper divisors (1322917).

25135043 is a wasteful number, since it uses less digits than its factorization.

25135043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322916.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 25135043 is about 5013.4861124770. The cubic root of 25135043 is about 292.9273195071.

Adding to 25135043 its reverse (34053152), we get a palindrome (59188195).

The spelling of 25135043 in words is "twenty-five million, one hundred thirty-five thousand, forty-three".