1020513043 has 12 divisors (see below), whose sum is σ = 1182630312. Its totient is φ = 873163520.

The previous prime is 1020513037. The next prime is 1020513049. The reversal of 1020513043 is 3403150201.

It is an interprime number because it is at equal distance from previous prime (1020513037) and next prime (1020513049).

It is a de Polignac number, because none of the positive numbers 2^k-1020513043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020513043.

It is not an unprimeable number, because it can be changed into a prime (1020513049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157330 + ... + 163687.

It is an arithmetic number, because the mean of its divisors is an integer number (98552526).

Almost surely, 2^1020513043 is an apocalyptic number.

1020513043 is a deficient number, since it is larger than the sum of its proper divisors (162117269).

1020513043 is a wasteful number, since it uses less digits than its factorization.

1020513043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321062 (or 321045 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1020513043 is about 31945.4698353303. The cubic root of 1020513043 is about 1006.7914527536.

Adding to 1020513043 its reverse (3403150201), we get a palindrome (4423663244).

The spelling of 1020513043 in words is "one billion, twenty million, five hundred thirteen thousand, forty-three".