1501901 has 2 divisors, whose sum is σ = 1501902. Its totient is φ = 1501900.

The previous prime is 1501897. The next prime is 1501909. The reversal of 1501901 is 1091051.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 940900 + 561001 = 970^2 + 749^2 .

It is a cyclic number.

It is not a de Polignac number, because 1501901 - 2² = 1501897 is a prime.

It is a super-2 number, since 2×1501901² = 4511413227602, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1501901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1501909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 750950 + 750951.

It is an arithmetic number, because the mean of its divisors is an integer number (750951).

2^1501901 is an apocalyptic number.

It is an amenable number.

1501901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1501901 is an equidigital number, since it uses as much as digits as its factorization.

1501901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45, while the sum is 17.

The square root of 1501901 is about 1225.5207056594. The cubic root of 1501901 is about 114.5197616584.

Adding to 1501901 its reverse (1091051), we get a palindrome (2592952).

The spelling of 1501901 in words is "one million, five hundred one thousand, nine hundred one".