7381381 has 4 divisors (see below), whose sum is σ = 8435872. Its totient is φ = 6326892.

The previous prime is 7381343. The next prime is 7381403. The reversal of 7381381 is 1831837.

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 a cyclic number.

It is not a de Polignac number, because 7381381 - 2⁹ = 7380869 is a prime.

It is a super-2 number, since 2×7381381² = 108969570934322, which contains 22 as substring.

It is a Duffinian number.

7381381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7381301) 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, 527235 + ... + 527248.

It is an arithmetic number, because the mean of its divisors is an integer number (2108968).

Almost surely, 2^7381381 is an apocalyptic number.

It is an amenable number.

7381381 is a deficient number, since it is larger than the sum of its proper divisors (1054491).

7381381 is a wasteful number, since it uses less digits than its factorization.

7381381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054490.

The product of its digits is 4032, while the sum is 31.

The square root of 7381381 is about 2716.8697061140. The cubic root of 7381381 is about 194.7059429387.

The spelling of 7381381 in words is "seven million, three hundred eighty-one thousand, three hundred eighty-one".