1501501 has 2 divisors, whose sum is σ = 1501502. Its totient is φ = 1501500.

The previous prime is 1501499. The next prime is 1501523. The reversal of 1501501 is 1051051.

1501501 = T₉₉₉ + T₁₀₀₀ + T₁₀₀₁.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1104601 + 396900 = 1051^2 + 630^2 .

It is an emirp because it is prime and its reverse (1051051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1501501 - 2¹ = 1501499 is a prime.

Together with 1501499, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1501541) 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, 750750 + 750751.

It is an arithmetic number, because the mean of its divisors is an integer number (750751).

2^1501501 is an apocalyptic number.

1501501 is the 1001-st centered triangular number.

It is an amenable number.

1501501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1501501 is an equidigital number, since it uses as much as digits as its factorization.

1501501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25, while the sum is 13.

The square root of 1501501 is about 1225.3574988549. The cubic root of 1501501 is about 114.5095941059.

Adding to 1501501 its reverse (1051051), we get a palindrome (2552552).

It can be divided in two parts, 1501 and 501, that added together give a palindrome (2002).

The spelling of 1501501 in words is "one million, five hundred one thousand, five hundred one".