1021230039 has 4 divisors (see below), whose sum is σ = 1361640056. Its totient is φ = 680820024.

The previous prime is 1021230037. The next prime is 1021230043. The reversal of 1021230039 is 9300321201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1021230039 - 2¹ = 1021230037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021229997 and 1021230024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021230037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170205004 + ... + 170205009.

It is an arithmetic number, because the mean of its divisors is an integer number (340410014).

Almost surely, 2^1021230039 is an apocalyptic number.

1021230039 is a deficient number, since it is larger than the sum of its proper divisors (340410017).

1021230039 is an equidigital number, since it uses as much as digits as its factorization.

1021230039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340410016.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 1021230039 is about 31956.6900507546. The cubic root of 1021230039 is about 1007.0271826995.

The spelling of 1021230039 in words is "one billion, twenty-one million, two hundred thirty thousand, thirty-nine".