1501001 has 8 divisors (see below), whose sum is σ = 1561824. Its totient is φ = 1441440.

The previous prime is 1500997. The next prime is 1501009. The reversal of 1501001 is 1001051.

It is a happy number.

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 1501001 - 2² = 1500997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1501001.

It is not an unprimeable number, because it can be changed into a prime (1501009) 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, 2621 + ... + 3141.

It is an arithmetic number, because the mean of its divisors is an integer number (195228).

2^1501001 is an apocalyptic number.

It is an amenable number.

1501001 is a deficient number, since it is larger than the sum of its proper divisors (60823).

1501001 is an equidigital number, since it uses as much as digits as its factorization.

1501001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631.

The product of its (nonzero) digits is 5, while the sum is 8.

The square root of 1501001 is about 1225.1534597755. The cubic root of 1501001 is about 114.4968821256.

Adding to 1501001 its reverse (1001051), we get a palindrome (2502052).

The spelling of 1501001 in words is "one million, five hundred one thousand, one".