381426081 has 16 divisors (see below), whose sum is σ = 524994624. Its totient is φ = 246141504.

The previous prime is 381426047. The next prime is 381426167. The reversal of 381426081 is 180624183.

It is not a de Polignac number, because 381426081 - 2¹⁴ = 381409697 is a prime.

It is a super-2 number, since 2×381426081² = 290971710534037122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (381426481) 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, 13146 + ... + 30588.

It is an arithmetic number, because the mean of its divisors is an integer number (32812164).

Almost surely, 2^381426081 is an apocalyptic number.

It is an amenable number.

381426081 is a deficient number, since it is larger than the sum of its proper divisors (143568543).

381426081 is a wasteful number, since it uses less digits than its factorization.

381426081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17680.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 381426081 is about 19530.1326416387. The cubic root of 381426081 is about 725.2205946251.

The spelling of 381426081 in words is "three hundred eighty-one million, four hundred twenty-six thousand, eighty-one".