1246155231 has 4 divisors (see below), whose sum is σ = 1661540312. Its totient is φ = 830770152.

The previous prime is 1246155191. The next prime is 1246155241. The reversal of 1246155231 is 1325516421.

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

It is not a de Polignac number, because 1246155231 - 2⁶ = 1246155167 is a prime.

It is a super-2 number, since 2×1246155231² = 3105805719497326722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1246155241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207692536 + ... + 207692541.

It is an arithmetic number, because the mean of its divisors is an integer number (415385078).

Almost surely, 2^1246155231 is an apocalyptic number.

1246155231 is a deficient number, since it is larger than the sum of its proper divisors (415385081).

1246155231 is an equidigital number, since it uses as much as digits as its factorization.

1246155231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415385080.

The product of its digits is 7200, while the sum is 30.

The square root of 1246155231 is about 35300.9239397498. The cubic root of 1246155231 is about 1076.1117702309. Note that the first 3 decimals are identical.

The spelling of 1246155231 in words is "one billion, two hundred forty-six million, one hundred fifty-five thousand, two hundred thirty-one".