42525431 has 8 divisors (see below), whose sum is σ = 46005120. Its totient is φ = 39075552.

The previous prime is 42525419. The next prime is 42525433. The reversal of 42525431 is 13452524.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42525431 - 2¹⁰ = 42524407 is a prime.

It is a super-2 number, since 2×42525431² = 3616824563471522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42525431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42525433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4436 + ... + 10233.

It is an arithmetic number, because the mean of its divisors is an integer number (5750640).

Almost surely, 2^42525431 is an apocalyptic number.

42525431 is a deficient number, since it is larger than the sum of its proper divisors (3479689).

42525431 is a wasteful number, since it uses less digits than its factorization.

42525431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14905.

The product of its digits is 4800, while the sum is 26.

The square root of 42525431 is about 6521.1525821744. The cubic root of 42525431 is about 349.0461949290.

Adding to 42525431 its reverse (13452524), we get a palindrome (55977955).

The spelling of 42525431 in words is "forty-two million, five hundred twenty-five thousand, four hundred thirty-one".