1040020131 has 4 divisors (see below), whose sum is σ = 1386693512. Its totient is φ = 693346752.

The previous prime is 1040020109. The next prime is 1040020139. The reversal of 1040020131 is 1310200401.

It is a happy number.

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

It is not a de Polignac number, because 1040020131 - 2¹⁰ = 1040019107 is a prime.

It is a super-2 number, since 2×1040020131² = 2163283745770514322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1040020139) 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, 173336686 + ... + 173336691.

It is an arithmetic number, because the mean of its divisors is an integer number (346673378).

Almost surely, 2^1040020131 is an apocalyptic number.

1040020131 is a deficient number, since it is larger than the sum of its proper divisors (346673381).

1040020131 is an equidigital number, since it uses as much as digits as its factorization.

1040020131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346673380.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1040020131 is about 32249.3431095891. The cubic root of 1040020131 is about 1013.1659409293.

Adding to 1040020131 its reverse (1310200401), we get a palindrome (2350220532).

The spelling of 1040020131 in words is "one billion, forty million, twenty thousand, one hundred thirty-one".