2151001 has 2 divisors, whose sum is σ = 2151002. Its totient is φ = 2151000.

The previous prime is 2150977. The next prime is 2151007. The reversal of 2151001 is 1001512.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1849600 + 301401 = 1360^2 + 549^2 .

It is a cyclic number.

It is not a de Polignac number, because 2151001 - 2⁵ = 2150969 is a prime.

It is a Chen prime.

2151001 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2151007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075500 + 1075501.

It is an arithmetic number, because the mean of its divisors is an integer number (1075501).

2^2151001 is an apocalyptic number.

It is an amenable number.

2151001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151001 is an equidigital number, since it uses as much as digits as its factorization.

2151001 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2151001 is about 1466.6291283075. The cubic root of 2151001 is about 129.0863152471.

Adding to 2151001 its reverse (1001512), we get a palindrome (3152513).

The spelling of 2151001 in words is "two million, one hundred fifty-one thousand, one".