42574509 has 12 divisors (see below), whose sum is σ = 61560252. Its totient is φ = 28353600.

The previous prime is 42574489. The next prime is 42574517. The reversal of 42574509 is 90547524.

It can be written as a sum of positive squares in 2 ways, for example, as 38713284 + 3861225 = 6222^2 + 1965^2 .

It is not a de Polignac number, because 42574509 - 2¹¹ = 42572461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42574559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10099 + ... + 13679.

It is an arithmetic number, because the mean of its divisors is an integer number (5130021).

Almost surely, 2^42574509 is an apocalyptic number.

It is an amenable number.

42574509 is a deficient number, since it is larger than the sum of its proper divisors (18985743).

42574509 is a wasteful number, since it uses less digits than its factorization.

42574509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4908 (or 4905 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 42574509 is about 6524.9144821982. The cubic root of 42574509 is about 349.1804197364.

The spelling of 42574509 in words is "forty-two million, five hundred seventy-four thousand, five hundred nine".