42492169 has 4 divisors (see below), whose sum is σ = 43640644. Its totient is φ = 41343696.

The previous prime is 42492143. The next prime is 42492193. The reversal of 42492169 is 96129424.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27164944 + 15327225 = 5212^2 + 3915^2 .

It is a cyclic number.

It is not a de Polignac number, because 42492169 - 2¹¹ = 42490121 is a prime.

It is a super-2 number, since 2×42492169² = 3611168852649122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1148437 = 42492169 / (4 + 2 + 4 + 9 + 2 + 1 + 6 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42492119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574182 + ... + 574255.

It is an arithmetic number, because the mean of its divisors is an integer number (10910161).

Almost surely, 2^42492169 is an apocalyptic number.

It is an amenable number.

42492169 is a deficient number, since it is larger than the sum of its proper divisors (1148475).

42492169 is a wasteful number, since it uses less digits than its factorization.

42492169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148474.

The product of its digits is 31104, while the sum is 37.

The square root of 42492169 is about 6518.6017672504. The cubic root of 42492169 is about 348.9551670228.

The spelling of 42492169 in words is "forty-two million, four hundred ninety-two thousand, one hundred sixty-nine".