1263961 has 2 divisors, whose sum is σ = 1263962. Its totient is φ = 1263960.

The previous prime is 1263953. The next prime is 1263973. The reversal of 1263961 is 1693621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1243225 + 20736 = 1115^2 + 144^2 .

It is an emirp because it is prime and its reverse (1693621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1263961 - 2³ = 1263953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1263931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631980 + 631981.

It is an arithmetic number, because the mean of its divisors is an integer number (631981).

2^1263961 is an apocalyptic number.

It is an amenable number.

1263961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263961 is an equidigital number, since it uses as much as digits as its factorization.

1263961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 28.

The square root of 1263961 is about 1124.2602011990. The cubic root of 1263961 is about 108.1212914852.

The spelling of 1263961 in words is "one million, two hundred sixty-three thousand, nine hundred sixty-one".