7145731 has 2 divisors, whose sum is σ = 7145732. Its totient is φ = 7145730.

The previous prime is 7145707. The next prime is 7145737. The reversal of 7145731 is 1375417.

It is a strong prime.

It is an emirp because it is prime and its reverse (1375417) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7145731 - 2¹¹ = 7143683 is a prime.

It is a super-2 number, since 2×7145731² = 102122943048722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7145731.

It is not a weakly prime, because it can be changed into another prime (7145737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3572865 + 3572866.

It is an arithmetic number, because the mean of its divisors is an integer number (3572866).

Almost surely, 2^7145731 is an apocalyptic number.

7145731 is a deficient number, since it is larger than the sum of its proper divisors (1).

7145731 is an equidigital number, since it uses as much as digits as its factorization.

7145731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2940, while the sum is 28.

The square root of 7145731 is about 2673.1500144960. The cubic root of 7145731 is about 192.6115033996.

The spelling of 7145731 in words is "seven million, one hundred forty-five thousand, seven hundred thirty-one".