1001501 has 2 divisors, whose sum is σ = 1001502. Its totient is φ = 1001500.

The previous prime is 1001491. The next prime is 1001527. The reversal of 1001501 is 1051001.

It is a happy number.

1001501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 682276 + 319225 = 826^2 + 565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001501 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500750 + 500751.

It is an arithmetic number, because the mean of its divisors is an integer number (500751).

2^1001501 is an apocalyptic number.

It is an amenable number.

1001501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001501 is an equidigital number, since it uses as much as digits as its factorization.

1001501 is an evil number, because the sum of its binary digits is even.

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

The square root of 1001501 is about 1000.7502185860. The cubic root of 1001501 is about 100.0500083208.

Adding to 1001501 its reverse (1051001), we get a palindrome (2052502).

It can be divided in two parts, 1001 and 501, that multiplied together give a triangular number (501501 = T₁₀₀₁).

The spelling of 1001501 in words is "one million, one thousand, five hundred one".