381145859 has 4 divisors (see below), whose sum is σ = 384642720. Its totient is φ = 377649000.

The previous prime is 381145823. The next prime is 381145867. The reversal of 381145859 is 958541183.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381145859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381145819) 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, 1748267 + ... + 1748484.

It is an arithmetic number, because the mean of its divisors is an integer number (96160680).

Almost surely, 2^381145859 is an apocalyptic number.

381145859 is a deficient number, since it is larger than the sum of its proper divisors (3496861).

381145859 is a wasteful number, since it uses less digits than its factorization.

381145859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3496860.

The product of its digits is 172800, while the sum is 44.

The square root of 381145859 is about 19522.9572298871. The cubic root of 381145859 is about 725.0429520332.

The spelling of 381145859 in words is "three hundred eighty-one million, one hundred forty-five thousand, eight hundred fifty-nine".