1551622 has 4 divisors (see below), whose sum is σ = 2327436. Its totient is φ = 775810.

The previous prime is 1551619. The next prime is 1551623. The reversal of 1551622 is 2261551.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1551593 and 1551602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387904 + ... + 387907.

It is an arithmetic number, because the mean of its divisors is an integer number (581859).

2^1551622 is an apocalyptic number.

1551622 is a deficient number, since it is larger than the sum of its proper divisors (775814).

1551622 is an equidigital number, since it uses as much as digits as its factorization.

1551622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775813.

The product of its digits is 600, while the sum is 22.

The square root of 1551622 is about 1245.6412003462. The cubic root of 1551622 is about 115.7698070774.

The spelling of 1551622 in words is "one million, five hundred fifty-one thousand, six hundred twenty-two".