1211797 has 2 divisors, whose sum is σ = 1211798. Its totient is φ = 1211796.

The previous prime is 1211789. The next prime is 1211807. The reversal of 1211797 is 7971121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 844561 + 367236 = 919^2 + 606^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211797 - 2³ = 1211789 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605898 + 605899.

It is an arithmetic number, because the mean of its divisors is an integer number (605899).

2^1211797 is an apocalyptic number.

It is an amenable number.

1211797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211797 is an equidigital number, since it uses as much as digits as its factorization.

1211797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 882, while the sum is 28.

The square root of 1211797 is about 1100.8165151377. The cubic root of 1211797 is about 106.6129492979.

It can be divided in two parts, 121179 and 7, that multiplied together give a triangular number (848253 = T₁₃₀₂).

The spelling of 1211797 in words is "one million, two hundred eleven thousand, seven hundred ninety-seven".