7381057 has 4 divisors (see below), whose sum is σ = 7386580. Its totient is φ = 7375536.

The previous prime is 7380983. The next prime is 7381067. The reversal of 7381057 is 7501837.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4198401 + 3182656 = 2049^2 + 1784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7381057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7381067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643 + ... + 3895.

It is an arithmetic number, because the mean of its divisors is an integer number (1846645).

Almost surely, 2^7381057 is an apocalyptic number.

It is an amenable number.

7381057 is a deficient number, since it is larger than the sum of its proper divisors (5523).

7381057 is a wasteful number, since it uses less digits than its factorization.

7381057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5522.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 7381057 is about 2716.8100780143. The cubic root of 7381057 is about 194.7030940749.

The spelling of 7381057 in words is "seven million, three hundred eighty-one thousand, fifty-seven".