1231005001 has 8 divisors (see below), whose sum is σ = 1240031808. Its totient is φ = 1221990000.

The previous prime is 1231004993. The next prime is 1231005007. The reversal of 1231005001 is 1005001321.

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 1231005001 - 2³ = 1231004993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231005007) 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, 380571 + ... + 383791.

It is an arithmetic number, because the mean of its divisors is an integer number (155003976).

Almost surely, 2^1231005001 is an apocalyptic number.

It is an amenable number.

1231005001 is a deficient number, since it is larger than the sum of its proper divisors (9026807).

1231005001 is a wasteful number, since it uses less digits than its factorization.

1231005001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5903.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 1231005001 is about 35085.6808541604. The cubic root of 1231005001 is about 1071.7330058440.

Adding to 1231005001 its reverse (1005001321), we get a palindrome (2236006322).

The spelling of 1231005001 in words is "one billion, two hundred thirty-one million, five thousand, one".