747381 has 4 divisors (see below), whose sum is σ = 996512. Its totient is φ = 498252.

The previous prime is 747377. The next prime is 747391. The reversal of 747381 is 183747.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 747381 - 2² = 747377 is a prime.

It is a super-2 number, since 2×747381² = 1117156718322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124561 + ... + 124566.

It is an arithmetic number, because the mean of its divisors is an integer number (249128).

2⁷⁴⁷³⁸¹ is an apocalyptic number.

It is an amenable number.

747381 is a deficient number, since it is larger than the sum of its proper divisors (249131).

747381 is a wasteful number, since it uses less digits than its factorization.

747381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249130.

The product of its digits is 4704, while the sum is 30.

The square root of 747381 is about 864.5120010734. The cubic root of 747381 is about 90.7501498833.

It can be divided in two parts, 747 and 381, that added together give a triangular number (1128 = T₄₇).

The spelling of 747381 in words is "seven hundred forty-seven thousand, three hundred eighty-one".