1622554 has 4 divisors (see below), whose sum is σ = 2433834. Its totient is φ = 811276.

The previous prime is 1622549. The next prime is 1622557. The reversal of 1622554 is 4552261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1620529 + 2025 = 1273^2 + 45^2 .

It is not an unprimeable number, because it can be changed into a prime (1622557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405637 + ... + 405640.

2^1622554 is an apocalyptic number.

1622554 is a deficient number, since it is larger than the sum of its proper divisors (811280).

1622554 is an equidigital number, since it uses as much as digits as its factorization.

1622554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811279.

The product of its digits is 2400, while the sum is 25.

The square root of 1622554 is about 1273.7951169635. The cubic root of 1622554 is about 117.5077164089.

The spelling of 1622554 in words is "one million, six hundred twenty-two thousand, five hundred fifty-four".