1261823 has 2 divisors, whose sum is σ = 1261824. Its totient is φ = 1261822.

The previous prime is 1261801. The next prime is 1261829. The reversal of 1261823 is 3281621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1261823 - 2⁶ = 1261759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1261829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630911 + 630912.

It is an arithmetic number, because the mean of its divisors is an integer number (630912).

2^1261823 is an apocalyptic number.

1261823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1261823 is an equidigital number, since it uses as much as digits as its factorization.

1261823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 1261823 is about 1123.3089512685. The cubic root of 1261823 is about 108.0602944075.

The spelling of 1261823 in words is "one million, two hundred sixty-one thousand, eight hundred twenty-three".