381154761 has 16 divisors (see below), whose sum is σ = 608110720. Its totient is φ = 234556560.

The previous prime is 381154729. The next prime is 381154771. The reversal of 381154761 is 167451183.

It is not a de Polignac number, because 381154761 - 2⁵ = 381154729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (381154771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 542605 + ... + 543306.

It is an arithmetic number, because the mean of its divisors is an integer number (38006920).

Almost surely, 2^381154761 is an apocalyptic number.

It is an amenable number.

381154761 is a deficient number, since it is larger than the sum of its proper divisors (226955959).

381154761 is a wasteful number, since it uses less digits than its factorization.

381154761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085933 (or 1085927 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 381154761 is about 19523.1852165573. The cubic root of 381154761 is about 725.0485966632.

The spelling of 381154761 in words is "three hundred eighty-one million, one hundred fifty-four thousand, seven hundred sixty-one".