1261797 has 4 divisors (see below), whose sum is σ = 1682400. Its totient is φ = 841196.

The previous prime is 1261789. The next prime is 1261801. The reversal of 1261797 is 7971621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1261797 - 2³ = 1261789 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210297 + ... + 210302.

It is an arithmetic number, because the mean of its divisors is an integer number (420600).

2^1261797 is an apocalyptic number.

It is an amenable number.

1261797 is a deficient number, since it is larger than the sum of its proper divisors (420603).

1261797 is an equidigital number, since it uses as much as digits as its factorization.

1261797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420602.

The product of its digits is 5292, while the sum is 33.

The square root of 1261797 is about 1123.2973782574. The cubic root of 1261797 is about 108.0595522043.

The spelling of 1261797 in words is "one million, two hundred sixty-one thousand, seven hundred ninety-seven".