1020019 has 16 divisors (see below), whose sum is σ = 1370880. Its totient is φ = 732960.

The previous prime is 1020013. The next prime is 1020023. The reversal of 1020019 is 9100201.

It is a cyclic number.

It is not a de Polignac number, because 1020019 - 2³ = 1020011 is a prime.

It is a super-2 number, since 2×1020019² = 2080877520722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 1019990 and 1020008.

It is not an unprimeable number, because it can be changed into a prime (1020011) 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 15 ways as a sum of consecutive naturals, for example, 492 + ... + 1510.

It is an arithmetic number, because the mean of its divisors is an integer number (85680).

2^1020019 is an apocalyptic number.

1020019 is a deficient number, since it is larger than the sum of its proper divisors (350861).

1020019 is a wasteful number, since it uses less digits than its factorization.

1020019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1020019 is about 1009.9599001941. The cubic root of 1020019 is about 100.6628959793.

The spelling of 1020019 in words is "one million, twenty thousand, nineteen".