1499221 has 2 divisors, whose sum is σ = 1499222. Its totient is φ = 1499220.

The previous prime is 1499219. The next prime is 1499227. The reversal of 1499221 is 1229941.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1368900 + 130321 = 1170^2 + 361^2 .

It is an emirp because it is prime and its reverse (1229941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1499221 - 2¹ = 1499219 is a prime.

Together with 1499219, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1499221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1499227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 749610 + 749611.

It is an arithmetic number, because the mean of its divisors is an integer number (749611).

2^1499221 is an apocalyptic number.

It is an amenable number.

1499221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1499221 is an equidigital number, since it uses as much as digits as its factorization.

1499221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 28.

The square root of 1499221 is about 1224.4268046723. The cubic root of 1499221 is about 114.4516045485.

It can be divided in two parts, 14 and 99221, that added together give a triangular number (99235 = T₄₄₅).

The spelling of 1499221 in words is "one million, four hundred ninety-nine thousand, two hundred twenty-one".