42125131 has 8 divisors (see below), whose sum is σ = 42606000. Its totient is φ = 41647200.

The previous prime is 42125119. The next prime is 42125137. The reversal of 42125131 is 13152124.

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

It is a cyclic number.

It is not a de Polignac number, because 42125131 - 2⁹ = 42124619 is a prime.

It is a super-2 number, since 2×42125131² = 3549053323534322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42125099 and 42125108.

It is not an unprimeable number, because it can be changed into a prime (42125137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39556 + ... + 40606.

It is an arithmetic number, because the mean of its divisors is an integer number (5325750).

Almost surely, 2^42125131 is an apocalyptic number.

42125131 is a deficient number, since it is larger than the sum of its proper divisors (480869).

42125131 is a wasteful number, since it uses less digits than its factorization.

42125131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469.

The product of its digits is 240, while the sum is 19.

The square root of 42125131 is about 6490.3875847287. The cubic root of 42125131 is about 347.9475275401.

Adding to 42125131 its reverse (13152124), we get a palindrome (55277255).

It can be divided in two parts, 421 and 25131, that added together give a palindrome (25552).

The spelling of 42125131 in words is "forty-two million, one hundred twenty-five thousand, one hundred thirty-one".