1020431 has 2 divisors, whose sum is σ = 1020432. Its totient is φ = 1020430.

The previous prime is 1020419. The next prime is 1020451. The reversal of 1020431 is 1340201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020431 is a prime.

It is a super-2 number, since 2×1020431² = 2082558851522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020401) 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 as a sum of consecutive naturals, namely, 510215 + 510216.

It is an arithmetic number, because the mean of its divisors is an integer number (510216).

2^1020431 is an apocalyptic number.

1020431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020431 is an equidigital number, since it uses as much as digits as its factorization.

1020431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1020431 is about 1010.1638480959. The cubic root of 1020431 is about 100.6764472074.

Adding to 1020431 its reverse (1340201), we get a palindrome (2360632).

The spelling of 1020431 in words is "one million, twenty thousand, four hundred thirty-one".