1399537 has 2 divisors, whose sum is σ = 1399538. Its totient is φ = 1399536.

The previous prime is 1399529. The next prime is 1399543. The reversal of 1399537 is 7359931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1263376 + 136161 = 1124^2 + 369^2 .

It is a cyclic number.

It is not a de Polignac number, because 1399537 - 2³ = 1399529 is a prime.

1399537 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1399496 and 1399505.

It is not a weakly prime, because it can be changed into another prime (1399507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699768 + 699769.

It is an arithmetic number, because the mean of its divisors is an integer number (699769).

2^1399537 is an apocalyptic number.

It is an amenable number.

1399537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399537 is an equidigital number, since it uses as much as digits as its factorization.

1399537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25515, while the sum is 37.

The square root of 1399537 is about 1183.0202872310. The cubic root of 1399537 is about 111.8565606346.

It can be divided in two parts, 1399 and 537, that added together give a square (1936 = 44²).

The spelling of 1399537 in words is "one million, three hundred ninety-nine thousand, five hundred thirty-seven".