1201001 has 2 divisors, whose sum is σ = 1201002. Its totient is φ = 1201000.

The previous prime is 1200989. The next prime is 1201003. The reversal of 1201001 is 1001021.

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., 640000 + 561001 = 800^2 + 749^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201001 - 2⁶ = 1200937 is a prime.

Together with 1201003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1201003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600500 + 600501.

It is an arithmetic number, because the mean of its divisors is an integer number (600501).

2^1201001 is an apocalyptic number.

It is an amenable number.

1201001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201001 is an equidigital number, since it uses as much as digits as its factorization.

1201001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 1201001 is about 1095.9019116691. The cubic root of 1201001 is about 106.2953965180.

Adding to 1201001 its reverse (1001021), we get a palindrome (2202022).

Multiplying 1201001 by its reverse (1001021), we get a palindrome (1202227222021).

The spelling of 1201001 in words is "one million, two hundred one thousand, one".