1651226 has 4 divisors (see below), whose sum is σ = 2476842. Its totient is φ = 825612.

The previous prime is 1651219. The next prime is 1651229. The reversal of 1651226 is 6221561.

It is a Cunningham number, because it is equal to 1285²+1.

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., 1651225 + 1 = 1285^2 + 1^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1651229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412805 + ... + 412808.

2^1651226 is an apocalyptic number.

1651226 is a deficient number, since it is larger than the sum of its proper divisors (825616).

1651226 is an equidigital number, since it uses as much as digits as its factorization.

1651226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825615.

The product of its digits is 720, while the sum is 23.

The square root of 1651226 is about 1285.0003891050. Note that the first 3 decimals coincide. The cubic root of 1651226 is about 118.1958349163.

Adding to 1651226 its reverse (6221561), we get a palindrome (7872787).

The spelling of 1651226 in words is "one million, six hundred fifty-one thousand, two hundred twenty-six".