381027021 has 8 divisors (see below), whose sum is σ = 514157280. Its totient is φ = 250957392.

The previous prime is 381026963. The next prime is 381027029. The reversal of 381027021 is 120720183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 381027021 - 2⁶ = 381026957 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 381026982 and 381027000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381027029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764866 + ... + 765363.

It is an arithmetic number, because the mean of its divisors is an integer number (64269660).

Almost surely, 2^381027021 is an apocalyptic number.

It is an amenable number.

381027021 is a deficient number, since it is larger than the sum of its proper divisors (133130259).

381027021 is a wasteful number, since it uses less digits than its factorization.

381027021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530315.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 381027021 is about 19519.9134475540. The cubic root of 381027021 is about 724.9675901485.

The spelling of 381027021 in words is "three hundred eighty-one million, twenty-seven thousand, twenty-one".