1551226 has 4 divisors (see below), whose sum is σ = 2326842. Its totient is φ = 775612.

The previous prime is 1551203. The next prime is 1551229. The reversal of 1551226 is 6221551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6221551 = 7 ⋅888793.

It can be written as a sum of positive squares in only one way, i.e., 1428025 + 123201 = 1195^2 + 351^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1551197 and 1551206.

It is not an unprimeable number, because it can be changed into a prime (1551229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387805 + ... + 387808.

2^1551226 is an apocalyptic number.

1551226 is a deficient number, since it is larger than the sum of its proper divisors (775616).

1551226 is an equidigital number, since it uses as much as digits as its factorization.

1551226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775615.

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

The square root of 1551226 is about 1245.4822359231. The cubic root of 1551226 is about 115.7599574396.

Adding to 1551226 its reverse (6221551), we get a palindrome (7772777).

The spelling of 1551226 in words is "one million, five hundred fifty-one thousand, two hundred twenty-six".