1145122131 has 4 divisors (see below), whose sum is σ = 1526829512. Its totient is φ = 763414752.

The previous prime is 1145122103. The next prime is 1145122163. The reversal of 1145122131 is 1312215411.

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

It is not a de Polignac number, because 1145122131 - 2⁷ = 1145122003 is a prime.

It is a super-2 number, since 2×1145122131² = 2622609389811962322, 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 = 1145122098 and 1145122107.

It is not an unprimeable number, because it can be changed into a prime (1145122331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190853686 + ... + 190853691.

It is an arithmetic number, because the mean of its divisors is an integer number (381707378).

Almost surely, 2^1145122131 is an apocalyptic number.

1145122131 is a deficient number, since it is larger than the sum of its proper divisors (381707381).

1145122131 is an equidigital number, since it uses as much as digits as its factorization.

1145122131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381707380.

The product of its digits is 240, while the sum is 21.

The square root of 1145122131 is about 33839.6532340389. The cubic root of 1145122131 is about 1046.2061517033.

Adding to 1145122131 its reverse (1312215411), we get a palindrome (2457337542).

The spelling of 1145122131 in words is "one billion, one hundred forty-five million, one hundred twenty-two thousand, one hundred thirty-one".