1522291 has 4 divisors (see below), whose sum is σ = 1563472. Its totient is φ = 1481112.

The previous prime is 1522253. The next prime is 1522321. The reversal of 1522291 is 1922251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1922251 = 857 ⋅2243.

It is a cyclic number.

It is not a de Polignac number, because 1522291 - 2¹³ = 1514099 is a prime.

1522291 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1522201) 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 in 3 ways as a sum of consecutive naturals, for example, 20535 + ... + 20608.

It is an arithmetic number, because the mean of its divisors is an integer number (390868).

2^1522291 is an apocalyptic number.

1522291 is the 660-th centered heptagonal number.

1522291 is a deficient number, since it is larger than the sum of its proper divisors (41181).

1522291 is an equidigital number, since it uses as much as digits as its factorization.

1522291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41180.

The product of its digits is 360, while the sum is 22.

The square root of 1522291 is about 1233.8115739447. The cubic root of 1522291 is about 115.0356789105.

The spelling of 1522291 in words is "one million, five hundred twenty-two thousand, two hundred ninety-one".