1522643 has 2 divisors, whose sum is σ = 1522644. Its totient is φ = 1522642.

The previous prime is 1522607. The next prime is 1522663. The reversal of 1522643 is 3462251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1522643 - 2⁶ = 1522579 is a prime.

It is not a weakly prime, because it can be changed into another prime (1522663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761321 + 761322.

It is an arithmetic number, because the mean of its divisors is an integer number (761322).

2^1522643 is an apocalyptic number.

1522643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1522643 is an equidigital number, since it uses as much as digits as its factorization.

1522643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 23.

The square root of 1522643 is about 1233.9542130890. The cubic root of 1522643 is about 115.0445448103.

Adding to 1522643 its reverse (3462251), we get a palindrome (4984894).

The spelling of 1522643 in words is "one million, five hundred twenty-two thousand, six hundred forty-three".