1299601 has 2 divisors, whose sum is σ = 1299602. Its totient is φ = 1299600.

The previous prime is 1299583. The next prime is 1299631. The reversal of 1299601 is 1069921.

It is a Cunningham number, because it is equal to 1140²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1299600 + 1 = 1140^2 + 1^2 .

It is an emirp because it is prime and its reverse (1069921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1299601 is a prime.

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 1299601.

It is not a weakly prime, because it can be changed into another prime (1299631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649800 + 649801.

It is an arithmetic number, because the mean of its divisors is an integer number (649801).

2^1299601 is an apocalyptic number.

It is an amenable number.

1299601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299601 is an equidigital number, since it uses as much as digits as its factorization.

1299601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 1299601 is about 1140.0004385964. Note that the first 3 decimals coincide. The cubic root of 1299601 is about 109.1281213748.

It can be divided in two parts, 129 and 9601, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 1299601 in words is "one million, two hundred ninety-nine thousand, six hundred one".