1020434 has 4 divisors (see below), whose sum is σ = 1530654. Its totient is φ = 510216.

The previous prime is 1020431. The next prime is 1020451. The reversal of 1020434 is 4340201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4340201 = 163 ⋅26627.

It can be written as a sum of positive squares in only one way, i.e., 908209 + 112225 = 953^2 + 335^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1020431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255107 + ... + 255110.

2^1020434 is an apocalyptic number.

1020434 is a deficient number, since it is larger than the sum of its proper divisors (510220).

1020434 is an equidigital number, since it uses as much as digits as its factorization.

1020434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510219.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 1020434 is about 1010.1653330025. The cubic root of 1020434 is about 100.6765458681.

Adding to 1020434 its reverse (4340201), we get a palindrome (5360635).

The spelling of 1020434 in words is "one million, twenty thousand, four hundred thirty-four".