42493509 has 12 divisors (see below), whose sum is σ = 61460256. Its totient is φ = 28291752.

The previous prime is 42493457. The next prime is 42493513. The reversal of 42493509 is 90539424.

It is not a de Polignac number, because 42493509 - 2⁹ = 42492997 is a prime.

It is a super-3 number, since 3×42493509³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42493579) 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, 5322 + ... + 10644.

It is an arithmetic number, because the mean of its divisors is an integer number (5121688).

Almost surely, 2^42493509 is an apocalyptic number.

It is an amenable number.

42493509 is a deficient number, since it is larger than the sum of its proper divisors (18966747).

42493509 is a wasteful number, since it uses less digits than its factorization.

42493509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6216 (or 6213 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 42493509 is about 6518.7045492183. The cubic root of 42493509 is about 348.9588351105.

The spelling of 42493509 in words is "forty-two million, four hundred ninety-three thousand, five hundred nine".