42144525 has 36 divisors (see below), whose sum is σ = 76473280. Its totient is φ = 22183200.

The previous prime is 42144521. The next prime is 42144539. The reversal of 42144525 is 52544124.

It is not a de Polignac number, because 42144525 - 2² = 42144521 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42144521) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16590 + ... + 18960.

Almost surely, 2^42144525 is an apocalyptic number.

42144525 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42144525 is a deficient number, since it is larger than the sum of its proper divisors (34328755).

42144525 is a wasteful number, since it uses less digits than its factorization.

42144525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466 (or 2458 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 42144525 is about 6491.8814684188. The cubic root of 42144525 is about 348.0009165652. Note that the first 3 decimals are identical.

Adding to 42144525 its reverse (52544124), we get a palindrome (94688649).

The spelling of 42144525 in words is "forty-two million, one hundred forty-four thousand, five hundred twenty-five".