1375513 has 2 divisors, whose sum is σ = 1375514. Its totient is φ = 1375512.

The previous prime is 1375481. The next prime is 1375531. The reversal of 1375513 is 3155731.

Together with next prime (1375531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1338649 + 36864 = 1157^2 + 192^2 .

It is an emirp because it is prime and its reverse (3155731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1375513 - 2⁵ = 1375481 is a prime.

It is not a weakly prime, because it can be changed into another prime (1375013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687756 + 687757.

It is an arithmetic number, because the mean of its divisors is an integer number (687757).

2^1375513 is an apocalyptic number.

It is an amenable number.

1375513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375513 is an equidigital number, since it uses as much as digits as its factorization.

1375513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1575, while the sum is 25.

The square root of 1375513 is about 1172.8226634918. The cubic root of 1375513 is about 111.2128319215.

The spelling of 1375513 in words is "one million, three hundred seventy-five thousand, five hundred thirteen".