42523401 has 4 divisors (see below), whose sum is σ = 56697872. Its totient is φ = 28348932.

The previous prime is 42523381. The next prime is 42523417. The reversal of 42523401 is 10432524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-42523401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42523451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7087231 + ... + 7087236.

It is an arithmetic number, because the mean of its divisors is an integer number (14174468).

Almost surely, 2^42523401 is an apocalyptic number.

It is an amenable number.

42523401 is a deficient number, since it is larger than the sum of its proper divisors (14174471).

42523401 is a wasteful number, since it uses less digits than its factorization.

42523401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14174470.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 42523401 is about 6520.9969329850. The cubic root of 42523401 is about 349.0406408011.

Adding to 42523401 its reverse (10432524), we get a palindrome (52955925).

It can be divided in two parts, 42523 and 401, that added together give a palindrome (42924).

The spelling of 42523401 in words is "forty-two million, five hundred twenty-three thousand, four hundred one".