1219901 has 4 divisors (see below), whose sum is σ = 1242972. Its totient is φ = 1196832.

The previous prime is 1219891. The next prime is 1219909. The reversal of 1219901 is 1099121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 765625 + 454276 = 875^2 + 674^2 .

It is a cyclic number.

It is not a de Polignac number, because 1219901 - 2⁶ = 1219837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1219909) 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, 11456 + ... + 11561.

It is an arithmetic number, because the mean of its divisors is an integer number (310743).

2^1219901 is an apocalyptic number.

It is an amenable number.

1219901 is a deficient number, since it is larger than the sum of its proper divisors (23071).

1219901 is an equidigital number, since it uses as much as digits as its factorization.

1219901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23070.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 1219901 is about 1104.4912856152. The cubic root of 1219901 is about 106.8500826514.

The spelling of 1219901 in words is "one million, two hundred nineteen thousand, nine hundred one".