1900501 has 2 divisors, whose sum is σ = 1900502. Its totient is φ = 1900500.

The previous prime is 1900499. The next prime is 1900511. The reversal of 1900501 is 1050091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 998001 + 902500 = 999^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 1900501 - 2¹ = 1900499 is a prime.

It is a super-2 number, since 2×1900501² = 7223808102002, which contains 22 as substring.

Together with 1900499, it forms a pair of twin primes.

1900501 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1900511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950250 + 950251.

It is an arithmetic number, because the mean of its divisors is an integer number (950251).

2^1900501 is an apocalyptic number.

It is an amenable number.

1900501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1900501 is an equidigital number, since it uses as much as digits as its factorization.

1900501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45, while the sum is 16.

The square root of 1900501 is about 1378.5865950313. The cubic root of 1900501 is about 123.8671183173.

Adding to 1900501 its reverse (1050091), we get a palindrome (2950592).

It can be divided in two parts, 1900 and 501, that added together give a 4-th power (2401 = 7⁴).

The spelling of 1900501 in words is "one million, nine hundred thousand, five hundred one".