381245491 has 8 divisors (see below), whose sum is σ = 419180544. Its totient is φ = 343856520.

The previous prime is 381245479. The next prime is 381245497. The reversal of 381245491 is 194542183.

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 381245491 - 2²⁵ = 347691059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381245491.

It is not an unprimeable number, because it can be changed into a prime (381245497) 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, 135055 + ... + 137848.

It is an arithmetic number, because the mean of its divisors is an integer number (52397568).

Almost surely, 2^381245491 is an apocalyptic number.

381245491 is a deficient number, since it is larger than the sum of its proper divisors (37935053).

381245491 is a wasteful number, since it uses less digits than its factorization.

381245491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273041.

The product of its digits is 34560, while the sum is 37.

The square root of 381245491 is about 19525.5087257669. The cubic root of 381245491 is about 725.1061222380.

The spelling of 381245491 in words is "three hundred eighty-one million, two hundred forty-five thousand, four hundred ninety-one".