1145651231 has 2 divisors, whose sum is σ = 1145651232. Its totient is φ = 1145651230.

The previous prime is 1145651201. The next prime is 1145651249. The reversal of 1145651231 is 1321565411.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1145651231 - 2⁶ = 1145651167 is a prime.

It is a super-2 number, since 2×1145651231² = 2625033486183630722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1145651194 and 1145651203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145651201) by changing a digit.

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 as a sum of consecutive naturals, namely, 572825615 + 572825616.

It is an arithmetic number, because the mean of its divisors is an integer number (572825616).

Almost surely, 2^1145651231 is an apocalyptic number.

1145651231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145651231 is an equidigital number, since it uses as much as digits as its factorization.

1145651231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 29.

The square root of 1145651231 is about 33847.4700827108. The cubic root of 1145651231 is about 1046.3672589560.

The spelling of 1145651231 in words is "one billion, one hundred forty-five million, six hundred fifty-one thousand, two hundred thirty-one".