1258822 has 4 divisors (see below), whose sum is σ = 1888236. Its totient is φ = 629410.

The previous prime is 1258819. The next prime is 1258837. The reversal of 1258822 is 2288521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2288521 = 97 ⋅23593.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314704 + ... + 314707.

It is an arithmetic number, because the mean of its divisors is an integer number (472059).

2^1258822 is an apocalyptic number.

1258822 is a deficient number, since it is larger than the sum of its proper divisors (629414).

1258822 is an equidigital number, since it uses as much as digits as its factorization.

1258822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629413.

The product of its digits is 2560, while the sum is 28.

The square root of 1258822 is about 1121.9723704263. The cubic root of 1258822 is about 107.9745596228.

It can be divided in two parts, 1258 and 822, that added together give a triangular number (2080 = T₆₄).

The spelling of 1258822 in words is "one million, two hundred fifty-eight thousand, eight hundred twenty-two".