1630501 has 2 divisors, whose sum is σ = 1630502. Its totient is φ = 1630500.

The previous prime is 1630483. The next prime is 1630543. The reversal of 1630501 is 1050361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1600225 + 30276 = 1265^2 + 174^2 .

It is a cyclic number.

It is not a de Polignac number, because 1630501 - 2¹⁷ = 1499429 is a prime.

It is a super-2 number, since 2×1630501² = 5317067022002, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1630801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815250 + 815251.

It is an arithmetic number, because the mean of its divisors is an integer number (815251).

2^1630501 is an apocalyptic number.

It is an amenable number.

1630501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630501 is an equidigital number, since it uses as much as digits as its factorization.

1630501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 1630501 is about 1276.9107251488. The cubic root of 1630501 is about 117.6992484770.

Adding to 1630501 its reverse (1050361), we get a palindrome (2680862).

The spelling of 1630501 in words is "one million, six hundred thirty thousand, five hundred one".