1228901233 has 6 divisors (see below), whose sum is σ = 1429538226. Its totient is φ = 1053343872.

The previous prime is 1228901221. The next prime is 1228901263. The reversal of 1228901233 is 3321098221.

It can be written as a sum of positive squares in only one way, i.e., 1226960784 + 1940449 = 35028^2 + 1393^2 .

It is not a de Polignac number, because 1228901233 - 2¹⁷ = 1228770161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1228901195 and 1228901204.

It is not an unprimeable number, because it can be changed into a prime (1228901213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12539760 + ... + 12539857.

It is an arithmetic number, because the mean of its divisors is an integer number (238256371).

Almost surely, 2^1228901233 is an apocalyptic number.

It is an amenable number.

1228901233 is a deficient number, since it is larger than the sum of its proper divisors (200636993).

1228901233 is an equidigital number, since it uses as much as digits as its factorization.

1228901233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25079631 (or 25079624 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1228901233 is about 35055.6875984483. The cubic root of 1228901233 is about 1071.1221328246.

Adding to 1228901233 its reverse (3321098221), we get a palindrome (4549999454).

The spelling of 1228901233 in words is "one billion, two hundred twenty-eight million, nine hundred one thousand, two hundred thirty-three".