381154021 has 8 divisors (see below), whose sum is σ = 402600704. Its totient is φ = 360279360.

The previous prime is 381154019. The next prime is 381154027. The reversal of 381154021 is 120451183.

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

It is a cyclic number.

It is not a de Polignac number, because 381154021 - 2¹ = 381154019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381154027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141636 + ... + 144301.

It is an arithmetic number, because the mean of its divisors is an integer number (50325088).

Almost surely, 2^381154021 is an apocalyptic number.

381154021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

381154021 is a deficient number, since it is larger than the sum of its proper divisors (21446683).

381154021 is a wasteful number, since it uses less digits than its factorization.

381154021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286011.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 381154021 is about 19523.1662647225. The cubic root of 381154021 is about 725.0481274432.

The spelling of 381154021 in words is "three hundred eighty-one million, one hundred fifty-four thousand, twenty-one".