1231231490 has 16 divisors (see below), whose sum is σ = 2220970752. Its totient is φ = 491436144.

The previous prime is 1231231489. The next prime is 1231231531. The reversal of 1231231490 is 941321321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127154 + ... + 136493.

It is an arithmetic number, because the mean of its divisors is an integer number (138810672).

Almost surely, 2^1231231490 is an apocalyptic number.

1231231490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231231490 is a deficient number, since it is larger than the sum of its proper divisors (989739262).

1231231490 is a wasteful number, since it uses less digits than its factorization.

1231231490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264121.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1231231490 is about 35088.9083614751. The cubic root of 1231231490 is about 1071.7987301510.

The spelling of 1231231490 in words is "one billion, two hundred thirty-one million, two hundred thirty-one thousand, four hundred ninety".