381497 has 4 divisors (see below), whose sum is σ = 403956. Its totient is φ = 359040.

The previous prime is 381487. The next prime is 381509. The reversal of 381497 is 794183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 794183 = 13 ⋅61091.

It can be written as a sum of positive squares in 2 ways, for example, as 132496 + 249001 = 364^2 + 499^2 .

It is not a de Polignac number, because 381497 - 2⁴ = 381481 is a prime.

It is a super-2 number, since 2×381497² = 291079922018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11204 + ... + 11237.

It is an arithmetic number, because the mean of its divisors is an integer number (100989).

2³⁸¹⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

381497 is a deficient number, since it is larger than the sum of its proper divisors (22459).

381497 is a wasteful number, since it uses less digits than its factorization.

381497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22458.

The product of its digits is 6048, while the sum is 32.

The square root of 381497 is about 617.6544341296. The cubic root of 381497 is about 72.5265538879.

Subtracting 381497 from its reverse (794183), we obtain a triangular number (412686 = T₉₀₈).

It can be divided in two parts, 381 and 497, that added together give a palindrome (878).

The spelling of 381497 in words is "three hundred eighty-one thousand, four hundred ninety-seven".