1315961 has 2 divisors, whose sum is σ = 1315962. Its totient is φ = 1315960.

The previous prime is 1315949. The next prime is 1315967. The reversal of 1315961 is 1695131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1308736 + 7225 = 1144^2 + 85^2 .

It is an emirp because it is prime and its reverse (1695131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1315961 - 2¹⁸ = 1053817 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 1315961.

It is not a weakly prime, because it can be changed into another prime (1315967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657980 + 657981.

It is an arithmetic number, because the mean of its divisors is an integer number (657981).

2^1315961 is an apocalyptic number.

It is an amenable number.

1315961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315961 is an equidigital number, since it uses as much as digits as its factorization.

1315961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 810, while the sum is 26.

The square root of 1315961 is about 1147.1534335040. The cubic root of 1315961 is about 109.5841322243.

The spelling of 1315961 in words is "one million, three hundred fifteen thousand, nine hundred sixty-one".