1286423231 has 4 divisors (see below), whose sum is σ = 1288653312. Its totient is φ = 1284193152.

The previous prime is 1286423219. The next prime is 1286423263. The reversal of 1286423231 is 1323246821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1323246821 = 13 ⋅101788217.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1286423231 is a prime.

It is a super-2 number, since 2×1286423231² = 3309769458512958722, 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 (1286423431) 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, 1114175 + ... + 1115328.

It is an arithmetic number, because the mean of its divisors is an integer number (322163328).

Almost surely, 2^1286423231 is an apocalyptic number.

1286423231 is a deficient number, since it is larger than the sum of its proper divisors (2230081).

1286423231 is an equidigital number, since it uses as much as digits as its factorization.

1286423231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230080.

The product of its digits is 13824, while the sum is 32.

The square root of 1286423231 is about 35866.7426873420. The cubic root of 1286423231 is about 1087.5801974767.

The spelling of 1286423231 in words is "one billion, two hundred eighty-six million, four hundred twenty-three thousand, two hundred thirty-one".