42531145 has 8 divisors (see below), whose sum is σ = 52282440. Its totient is φ = 33194880.

The previous prime is 42531133. The next prime is 42531169. The reversal of 42531145 is 54113524.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1006009 + 41525136 = 1003^2 + 6444^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42531145 - 2⁷ = 42531017 is a prime.

It is a super-2 number, since 2×42531145² = 3617796590022050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103530 + ... + 103939.

It is an arithmetic number, because the mean of its divisors is an integer number (6535305).

Almost surely, 2^42531145 is an apocalyptic number.

It is an amenable number.

42531145 is a deficient number, since it is larger than the sum of its proper divisors (9751295).

42531145 is a wasteful number, since it uses less digits than its factorization.

42531145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207515.

The product of its digits is 2400, while the sum is 25.

The square root of 42531145 is about 6521.5906801945. The cubic root of 42531145 is about 349.0618276189.

Adding to 42531145 its reverse (54113524), we get a palindrome (96644669).

The spelling of 42531145 in words is "forty-two million, five hundred thirty-one thousand, one hundred forty-five".