381049145 has 4 divisors (see below), whose sum is σ = 457258980. Its totient is φ = 304839312.

The previous prime is 381049133. The next prime is 381049147. The reversal of 381049145 is 541940183.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47183161 + 333865984 = 6869^2 + 18272^2 .

It is a cyclic number.

It is not a de Polignac number, because 381049145 - 2¹⁰ = 381048121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381049147) 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, 38104910 + ... + 38104919.

It is an arithmetic number, because the mean of its divisors is an integer number (114314745).

Almost surely, 2^381049145 is an apocalyptic number.

It is an amenable number.

381049145 is a deficient number, since it is larger than the sum of its proper divisors (76209835).

381049145 is an equidigital number, since it uses as much as digits as its factorization.

381049145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76209834.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 381049145 is about 19520.4801426604. The cubic root of 381049145 is about 724.9816214128.

The spelling of 381049145 in words is "three hundred eighty-one million, forty-nine thousand, one hundred forty-five".