1219961 has 2 divisors, whose sum is σ = 1219962. Its totient is φ = 1219960.

The previous prime is 1219957. The next prime is 1219963. The reversal of 1219961 is 1699121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1000000 + 219961 = 1000^2 + 469^2 .

It is a cyclic number.

It is not a de Polignac number, because 1219961 - 2² = 1219957 is a prime.

Together with 1219963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1219963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609980 + 609981.

It is an arithmetic number, because the mean of its divisors is an integer number (609981).

2^1219961 is an apocalyptic number.

It is an amenable number.

1219961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1219961 is an equidigital number, since it uses as much as digits as its factorization.

1219961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 29.

The square root of 1219961 is about 1104.5184471072. The cubic root of 1219961 is about 106.8518344055.

The spelling of 1219961 in words is "one million, two hundred nineteen thousand, nine hundred sixty-one".