1145195381 has 8 divisors (see below), whose sum is σ = 1249565184. Its totient is φ = 1040869120.

The previous prime is 1145195377. The next prime is 1145195407. The reversal of 1145195381 is 1835915411.

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 1145195381 - 2² = 1145195377 is a prime.

It is a super-2 number, since 2×1145195381² = 2622944921327470322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145195351) 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 in 7 ways as a sum of consecutive naturals, for example, 70805 + ... + 85461.

It is an arithmetic number, because the mean of its divisors is an integer number (156195648).

Almost surely, 2^1145195381 is an apocalyptic number.

1145195381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1145195381 is a deficient number, since it is larger than the sum of its proper divisors (104369803).

1145195381 is a wasteful number, since it uses less digits than its factorization.

1145195381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21771.

The product of its digits is 21600, while the sum is 38.

The square root of 1145195381 is about 33840.7355268765. The cubic root of 1145195381 is about 1046.2284587756.

The spelling of 1145195381 in words is "one billion, one hundred forty-five million, one hundred ninety-five thousand, three hundred eighty-one".