1219801 has 12 divisors (see below), whose sum is σ = 1422036. Its totient is φ = 1041920.

The previous prime is 1219793. The next prime is 1219807. The reversal of 1219801 is 1089121.

It can be written as a sum of positive squares in 2 ways, for example, as 853776 + 366025 = 924^2 + 605^2 .

It is not a de Polignac number, because 1219801 - 2³ = 1219793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1219807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1761 + ... + 2353.

It is an arithmetic number, because the mean of its divisors is an integer number (118503).

2^1219801 is an apocalyptic number.

1219801 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1219801 is a deficient number, since it is larger than the sum of its proper divisors (202235).

1219801 is a wasteful number, since it uses less digits than its factorization.

1219801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1219801 is about 1104.4460149776. The cubic root of 1219801 is about 106.8471629335.

It can be divided in two parts, 121 and 9801, that multiplied together give a 4-th power (1185921 = 33⁴).

The spelling of 1219801 in words is "one million, two hundred nineteen thousand, eight hundred one".