42732369 has 9 divisors (see below), whose sum is σ = 61752873. Its totient is φ = 28475172.

The previous prime is 42732359. The next prime is 42732377. The reversal of 42732369 is 96323724.

It is a happy number.

The square root of 42732369 is 6537.

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

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 42732369 - 2⁷ = 42732241 is a prime.

It is a super-2 number, since 2×42732369² = 3652110720704322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42732329) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 18522 + ... + 20700.

Almost surely, 2^42732369 is an apocalyptic number.

42732369 is the 6537-th square number.

42732369 is the 3269-th centered octagonal number.

It is an amenable number.

42732369 is a deficient number, since it is larger than the sum of its proper divisors (19020504).

42732369 is an frugal number, since it uses more digits than its factorization.

42732369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4364 (or 2182 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The cubic root of 42732369 is about 349.6114572651.

Multiplying 42732369 by its sum of digits (36), we get a square (1538365284 = 39222²).

The spelling of 42732369 in words is "forty-two million, seven hundred thirty-two thousand, three hundred sixty-nine".