1501020001 has 16 divisors (see below), whose sum is σ = 1637443584. Its totient is φ = 1367668224.

The previous prime is 1501019999. The next prime is 1501020011. The reversal of 1501020001 is 1000201051.

It is a happy number.

It is not a de Polignac number, because 1501020001 - 2¹ = 1501019999 is a prime.

It is a super-2 number, since 2×1501020001² = 4506122086804080002, which contains 22 as substring.

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 1501020001.

It is not an unprimeable number, because it can be changed into a prime (1501020011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 557280 + ... + 559966.

It is an arithmetic number, because the mean of its divisors is an integer number (102340224).

Almost surely, 2^1501020001 is an apocalyptic number.

It is an amenable number.

1501020001 is a deficient number, since it is larger than the sum of its proper divisors (136423583).

1501020001 is a wasteful number, since it uses less digits than its factorization.

1501020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240.

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 1501020001 is about 38742.9993805333. Note that the first 3 decimals coincide. The cubic root of 1501020001 is about 1144.9736525786.

Adding to 1501020001 its reverse (1000201051), we get a palindrome (2501221052).

The spelling of 1501020001 in words is "one billion, five hundred one million, twenty thousand, one".