1220019 has 4 divisors (see below), whose sum is σ = 1626696. Its totient is φ = 813344.

The previous prime is 1219991. The next prime is 1220027. The reversal of 1220019 is 9100221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1220019 - 2⁷ = 1219891 is a prime.

It is a super-2 number, since 2×1220019² = 2976892720722, which contains 22 as substring.

It is a D-number.

1220019 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1220029) 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, 203334 + ... + 203339.

It is an arithmetic number, because the mean of its divisors is an integer number (406674).

2^1220019 is an apocalyptic number.

1220019 is a deficient number, since it is larger than the sum of its proper divisors (406677).

1220019 is an equidigital number, since it uses as much as digits as its factorization.

1220019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406676.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1220019 is about 1104.5447025811. The cubic root of 1220019 is about 106.8535277132.

The spelling of 1220019 in words is "one million, two hundred twenty thousand, nineteen".