1145906231 has 2 divisors, whose sum is σ = 1145906232. Its totient is φ = 1145906230.

The previous prime is 1145906221. The next prime is 1145906249. The reversal of 1145906231 is 1326095411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1145906231 - 2²⁶ = 1078797367 is a prime.

It is a super-2 number, since 2×1145906231² = 2626202180489250722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145906221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572953115 + 572953116.

It is an arithmetic number, because the mean of its divisors is an integer number (572953116).

Almost surely, 2^1145906231 is an apocalyptic number.

1145906231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145906231 is an equidigital number, since it uses as much as digits as its factorization.

1145906231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1145906231 is about 33851.2367720885. The cubic root of 1145906231 is about 1046.4448869605. Note that the first 3 decimals are identical.

The spelling of 1145906231 in words is "one billion, one hundred forty-five million, nine hundred six thousand, two hundred thirty-one".