42523441 has 3 divisors (see below), whose sum is σ = 42529963. Its totient is φ = 42516920.

The previous prime is 42523433. The next prime is 42523451. The reversal of 42523441 is 14432524.

It is a happy number.

The square root of 42523441 is 6521.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 39425841 + 3097600 = 6279^2 + 1760^2 .

It is not a de Polignac number, because 42523441 - 2³ = 42523433 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 polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3261 + ... + 9781.

Almost surely, 2^42523441 is an apocalyptic number.

42523441 is the 6521-st square number.

42523441 is the 3261-st centered octagonal number.

It is an amenable number.

42523441 is a deficient number, since it is larger than the sum of its proper divisors (6522).

42523441 is an frugal number, since it uses more digits than its factorization.

42523441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13042 (or 6521 counting only the distinct ones).

The product of its digits is 3840, while the sum is 25.

The cubic root of 42523441 is about 349.0407502437.

Multiplying 42523441 by its sum of digits (25), we get a square (1063086025 = 32605²).

Adding to 42523441 its reverse (14432524), we get a palindrome (56955965).

The spelling of 42523441 in words is "forty-two million, five hundred twenty-three thousand, four hundred forty-one".