1231300420 has 36 divisors (see below), whose sum is σ = 3007893420. Its totient is φ = 422159808.

The previous prime is 1231300381. The next prime is 1231300451. The reversal of 1231300420 is 240031321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 783216196 + 448084224 = 27986^2 + 21168^2 .

It is a super-2 number, since 2×1231300420² = 3032201448584352800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231300394 and 1231300403.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 627235 + ... + 629194.

It is an arithmetic number, because the mean of its divisors is an integer number (83552595).

Almost surely, 2^1231300420 is an apocalyptic number.

1231300420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231300420 is an abundant number, since it is smaller than the sum of its proper divisors (1776593000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231300420 is a wasteful number, since it uses less digits than its factorization.

1231300420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256452 (or 1256443 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1231300420 is about 35089.8905669425. The cubic root of 1231300420 is about 1071.8187311847.

Adding to 1231300420 its reverse (240031321), we get a palindrome (1471331741).

The spelling of 1231300420 in words is "one billion, two hundred thirty-one million, three hundred thousand, four hundred twenty".