1365731 has 2 divisors, whose sum is σ = 1365732. Its totient is φ = 1365730.

The previous prime is 1365719. The next prime is 1365733. The reversal of 1365731 is 1375631.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1365731 - 2⁶ = 1365667 is a prime.

It is a super-2 number, since 2×1365731² = 3730442328722, which contains 22 as substring.

Together with 1365733, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1365731.

It is not a weakly prime, because it can be changed into another prime (1365733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 682865 + 682866.

It is an arithmetic number, because the mean of its divisors is an integer number (682866).

2^1365731 is an apocalyptic number.

1365731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1365731 is an equidigital number, since it uses as much as digits as its factorization.

1365731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1890, while the sum is 26.

The square root of 1365731 is about 1168.6449418023. The cubic root of 1365731 is about 110.9485734235.

The spelling of 1365731 in words is "one million, three hundred sixty-five thousand, seven hundred thirty-one".