1020231 has 6 divisors (see below), whose sum is σ = 1473680. Its totient is φ = 680148.

The previous prime is 1020223. The next prime is 1020233. The reversal of 1020231 is 1320201.

It is a happy number.

It is not a de Polignac number, because 1020231 - 2³ = 1020223 is a prime.

It is a super-2 number, since 2×1020231² = 2081742586722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 113359 = 1020231 / (1 + 0 + 2 + 0 + 2 + 3 + 1).

It is a Duffinian number.

1020231 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020233) 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 5 ways as a sum of consecutive naturals, for example, 56671 + ... + 56688.

2^1020231 is an apocalyptic number.

1020231 is a deficient number, since it is larger than the sum of its proper divisors (453449).

1020231 is a wasteful number, since it uses less digits than its factorization.

1020231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113365 (or 113362 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1020231 is about 1010.0648494032. The cubic root of 1020231 is about 100.6698693970.

Adding to 1020231 its reverse (1320201), we get a palindrome (2340432).

The spelling of 1020231 in words is "one million, twenty thousand, two hundred thirty-one".