1020340131 has 4 divisors (see below), whose sum is σ = 1360453512. Its totient is φ = 680226752.

The previous prime is 1020340121. The next prime is 1020340133. The reversal of 1020340131 is 1310430201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1310430201 = 3 ⋅436810067.

It is a cyclic number.

It is not a de Polignac number, because 1020340131 - 2⁶ = 1020340067 is a prime.

It is a super-2 number, since 2×1020340131² = 2082187965858194322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1020340131.

It is not an unprimeable number, because it can be changed into a prime (1020340133) 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, 170056686 + ... + 170056691.

It is an arithmetic number, because the mean of its divisors is an integer number (340113378).

Almost surely, 2^1020340131 is an apocalyptic number.

1020340131 is a deficient number, since it is larger than the sum of its proper divisors (340113381).

1020340131 is an equidigital number, since it uses as much as digits as its factorization.

1020340131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340113380.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1020340131 is about 31942.7633588580. The cubic root of 1020340131 is about 1006.7345871871.

Adding to 1020340131 its reverse (1310430201), we get a palindrome (2330770332).

The spelling of 1020340131 in words is "one billion, twenty million, three hundred forty thousand, one hundred thirty-one".