42481129 has 4 divisors (see below), whose sum is σ = 43851520. Its totient is φ = 41110740.

The previous prime is 42481099. The next prime is 42481133. The reversal of 42481129 is 92118424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42481129 - 2¹¹ = 42479081 is a prime.

It is a super-2 number, since 2×42481129² = 3609292642229282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 1370359 = 42481129 / (4 + 2 + 4 + 8 + 1 + 1 + 2 + 9).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42481129.

It is not an unprimeable number, because it can be changed into a prime (42481189) 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, 685149 + ... + 685210.

It is an arithmetic number, because the mean of its divisors is an integer number (10962880).

Almost surely, 2^42481129 is an apocalyptic number.

It is an amenable number.

42481129 is a deficient number, since it is larger than the sum of its proper divisors (1370391).

42481129 is a wasteful number, since it uses less digits than its factorization.

42481129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370390.

The product of its digits is 4608, while the sum is 31.

The square root of 42481129 is about 6517.7549048733. The cubic root of 42481129 is about 348.9249434245.

The spelling of 42481129 in words is "forty-two million, four hundred eighty-one thousand, one hundred twenty-nine".