42625145 has 4 divisors (see below), whose sum is σ = 51150180. Its totient is φ = 34100112.

The previous prime is 42625139. The next prime is 42625181. The reversal of 42625145 is 54152624.

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 12243001 + 30382144 = 3499^2 + 5512^2 .

It is a cyclic number.

It is not a de Polignac number, because 42625145 - 2⁴ = 42625129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4262510 + ... + 4262519.

It is an arithmetic number, because the mean of its divisors is an integer number (12787545).

Almost surely, 2^42625145 is an apocalyptic number.

It is an amenable number.

42625145 is a deficient number, since it is larger than the sum of its proper divisors (8525035).

42625145 is an equidigital number, since it uses as much as digits as its factorization.

42625145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8525034.

The product of its digits is 9600, while the sum is 29.

The square root of 42625145 is about 6528.7935332648. The cubic root of 42625145 is about 349.3187974895.

Adding to 42625145 its reverse (54152624), we get a palindrome (96777769).

The spelling of 42625145 in words is "forty-two million, six hundred twenty-five thousand, one hundred forty-five".