1551233 has 4 divisors (see below), whose sum is σ = 1642500. Its totient is φ = 1459968.

The previous prime is 1551229. The next prime is 1551241. The reversal of 1551233 is 3321551.

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

It can be written as a sum of positive squares in 2 ways, for example, as 452929 + 1098304 = 673^2 + 1048^2 .

It is a cyclic number.

It is not a de Polignac number, because 1551233 - 2² = 1551229 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1551203) 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 in 3 ways as a sum of consecutive naturals, for example, 45608 + ... + 45641.

It is an arithmetic number, because the mean of its divisors is an integer number (410625).

2^1551233 is an apocalyptic number.

It is an amenable number.

1551233 is a deficient number, since it is larger than the sum of its proper divisors (91267).

1551233 is an equidigital number, since it uses as much as digits as its factorization.

1551233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91266.

The product of its digits is 450, while the sum is 20.

The square root of 1551233 is about 1245.4850460764. The cubic root of 1551233 is about 115.7601315639.

Adding to 1551233 its reverse (3321551), we get a palindrome (4872784).

The spelling of 1551233 in words is "one million, five hundred fifty-one thousand, two hundred thirty-three".