1145890797 has 32 divisors (see below), whose sum is σ = 1711964160. Its totient is φ = 677994240.

The previous prime is 1145890787. The next prime is 1145890829. The reversal of 1145890797 is 7970985411.

It is a happy number.

It is not a de Polignac number, because 1145890797 - 2¹² = 1145886701 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145890747) 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 31 ways as a sum of consecutive naturals, for example, 76404 + ... + 90162.

It is an arithmetic number, because the mean of its divisors is an integer number (53498880).

Almost surely, 2^1145890797 is an apocalyptic number.

1145890797 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1145890797 is a deficient number, since it is larger than the sum of its proper divisors (566073363).

1145890797 is a wasteful number, since it uses less digits than its factorization.

1145890797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13873.

The product of its (nonzero) digits is 635040, while the sum is 51.

The square root of 1145890797 is about 33851.0088032838. The cubic root of 1145890797 is about 1046.4401888150.

The spelling of 1145890797 in words is "one billion, one hundred forty-five million, eight hundred ninety thousand, seven hundred ninety-seven".