1020401023 has 8 divisors (see below), whose sum is σ = 1075259520. Its totient is φ = 965657880.

The previous prime is 1020401017. The next prime is 1020401077. The reversal of 1020401023 is 3201040201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1020401023 - 2¹³ = 1020392831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020400994 and 1020401012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020401323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10363 + ... + 46348.

It is an arithmetic number, because the mean of its divisors is an integer number (134407440).

Almost surely, 2^1020401023 is an apocalyptic number.

1020401023 is a deficient number, since it is larger than the sum of its proper divisors (54858497).

1020401023 is an equidigital number, since it uses as much as digits as its factorization.

1020401023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57677.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1020401023 is about 31943.7164869713. The cubic root of 1020401023 is about 1006.7546134709.

Adding to 1020401023 its reverse (3201040201), we get a palindrome (4221441224).

The spelling of 1020401023 in words is "one billion, twenty million, four hundred one thousand, twenty-three".