7240381 has 2 divisors, whose sum is σ = 7240382. Its totient is φ = 7240380.

The previous prime is 7240361. The next prime is 7240393. The reversal of 7240381 is 1830427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6502500 + 737881 = 2550^2 + 859^2 .

It is a cyclic number.

It is not a de Polignac number, because 7240381 - 2⁷ = 7240253 is a prime.

It is a super-2 number, since 2×7240381² = 104846234050322, which contains 22 as substring.

7240381 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7240301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3620190 + 3620191.

It is an arithmetic number, because the mean of its divisors is an integer number (3620191).

Almost surely, 2^7240381 is an apocalyptic number.

It is an amenable number.

7240381 is a deficient number, since it is larger than the sum of its proper divisors (1).

7240381 is an equidigital number, since it uses as much as digits as its factorization.

7240381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 7240381 is about 2690.7956072508. The cubic root of 7240381 is about 193.4581988328.

The spelling of 7240381 in words is "seven million, two hundred forty thousand, three hundred eighty-one".