1145391131 has 8 divisors (see below), whose sum is σ = 1202380800. Its totient is φ = 1089654120.

The previous prime is 1145391101. The next prime is 1145391139. The reversal of 1145391131 is 1311935411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1145391131 - 2²⁶ = 1078282267 is a prime.

It is a super-2 number, since 2×1145391131² = 2623841685946918322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1145391094 and 1145391103.

It is not an unprimeable number, because it can be changed into a prime (1145391139) 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 in 7 ways as a sum of consecutive naturals, for example, 311291 + ... + 314948.

It is an arithmetic number, because the mean of its divisors is an integer number (150297600).

Almost surely, 2^1145391131 is an apocalyptic number.

1145391131 is a deficient number, since it is larger than the sum of its proper divisors (56989669).

1145391131 is an equidigital number, since it uses as much as digits as its factorization.

1145391131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626329.

The product of its digits is 1620, while the sum is 29.

The square root of 1145391131 is about 33843.6276276643. The cubic root of 1145391131 is about 1046.2880665236.

The spelling of 1145391131 in words is "one billion, one hundred forty-five million, three hundred ninety-one thousand, one hundred thirty-one".