1251622 has 4 divisors (see below), whose sum is σ = 1877436. Its totient is φ = 625810.

The previous prime is 1251583. The next prime is 1251641. The reversal of 1251622 is 2261521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2261521 = 23 ⋅98327.

It is a self number, because there is not a number n which added to its sum of digits gives 1251622.

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, 312904 + ... + 312907.

It is an arithmetic number, because the mean of its divisors is an integer number (469359).

2^1251622 is an apocalyptic number.

1251622 is a deficient number, since it is larger than the sum of its proper divisors (625814).

1251622 is an equidigital number, since it uses as much as digits as its factorization.

1251622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625813.

The product of its digits is 240, while the sum is 19.

The square root of 1251622 is about 1118.7591340409. The cubic root of 1251622 is about 107.7683076039.

The spelling of 1251622 in words is "one million, two hundred fifty-one thousand, six hundred twenty-two".