381465745 has 16 divisors (see below), whose sum is σ = 470975040. Its totient is φ = 296391744.

The previous prime is 381465743. The next prime is 381465761. The reversal of 381465745 is 547564183.

It is a cyclic number.

It is not a de Polignac number, because 381465745 - 2¹ = 381465743 is a prime.

It is a super-2 number, since 2×381465745² = 291032229216810050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (381465743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124846 + ... + 127864.

It is an arithmetic number, because the mean of its divisors is an integer number (29435940).

Almost surely, 2^381465745 is an apocalyptic number.

It is an amenable number.

381465745 is a deficient number, since it is larger than the sum of its proper divisors (89509295).

381465745 is a wasteful number, since it uses less digits than its factorization.

381465745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3744.

The product of its digits is 403200, while the sum is 43.

The square root of 381465745 is about 19531.1480717340. The cubic root of 381465745 is about 725.2457320013.

The spelling of 381465745 in words is "three hundred eighty-one million, four hundred sixty-five thousand, seven hundred forty-five".