7312381 has 2 divisors, whose sum is σ = 7312382. Its totient is φ = 7312380.

The previous prime is 7312339. The next prime is 7312387. The reversal of 7312381 is 1832137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4305625 + 3006756 = 2075^2 + 1734^2 .

It is an emirp because it is prime and its reverse (1832137) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7312381 - 2¹⁷ = 7181309 is a prime.

It is a super-2 number, since 2×7312381² = 106941831778322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7312387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3656190 + 3656191.

It is an arithmetic number, because the mean of its divisors is an integer number (3656191).

Almost surely, 2^7312381 is an apocalyptic number.

It is an amenable number.

7312381 is a deficient number, since it is larger than the sum of its proper divisors (1).

7312381 is an equidigital number, since it uses as much as digits as its factorization.

7312381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 25.

The square root of 7312381 is about 2704.1414534007. The cubic root of 7312381 is about 194.0973490236.

It can be divided in two parts, 7312 and 381, that multiplied together give a palindrome (2785872).

The spelling of 7312381 in words is "seven million, three hundred twelve thousand, three hundred eighty-one".