1020405131 has 4 divisors (see below), whose sum is σ = 1039658112. Its totient is φ = 1001152152.

The previous prime is 1020405091. The next prime is 1020405151. The reversal of 1020405131 is 1315040201.

1020405131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1315040201 = 109 ⋅12064589.

It is a cyclic number.

It is not a de Polignac number, because 1020405131 - 2²² = 1016210827 is a prime.

It is a super-2 number, since 2×1020405131² = 2082453262742254322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020405151) 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, 9626411 + ... + 9626516.

It is an arithmetic number, because the mean of its divisors is an integer number (259914528).

Almost surely, 2^1020405131 is an apocalyptic number.

1020405131 is a deficient number, since it is larger than the sum of its proper divisors (19252981).

1020405131 is an equidigital number, since it uses as much as digits as its factorization.

1020405131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19252980.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1020405131 is about 31943.7807875023. The cubic root of 1020405131 is about 1006.7559644895.

Adding to 1020405131 its reverse (1315040201), we get a palindrome (2335445332).

The spelling of 1020405131 in words is "one billion, twenty million, four hundred five thousand, one hundred thirty-one".