1005401023 has 8 divisors (see below), whose sum is σ = 1108109520. Its totient is φ = 904577280.

The previous prime is 1005400993. The next prime is 1005401051. The reversal of 1005401023 is 3201045001.

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 1005401023 - 2⁹ = 1005400511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1005400988 and 1005401006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005401053) 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, 470068 + ... + 472201.

It is an arithmetic number, because the mean of its divisors is an integer number (138513690).

Almost surely, 2^1005401023 is an apocalyptic number.

1005401023 is a deficient number, since it is larger than the sum of its proper divisors (102708497).

1005401023 is an equidigital number, since it uses as much as digits as its factorization.

1005401023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942377.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1005401023 is about 31708.0592752064. The cubic root of 1005401023 is about 1001.7971094629.

Adding to 1005401023 its reverse (3201045001), we get a palindrome (4206446024).

The spelling of 1005401023 in words is "one billion, five million, four hundred one thousand, twenty-three".