1121440402 has 4 divisors (see below), whose sum is σ = 1682160606. Its totient is φ = 560720200.

The previous prime is 1121440399. The next prime is 1121440403. The reversal of 1121440402 is 2040441211.

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., 1063999161 + 57441241 = 32619^2 + 7579^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1121440402.

It is not an unprimeable number, because it can be changed into a prime (1121440403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280360099 + ... + 280360102.

Almost surely, 2^1121440402 is an apocalyptic number.

1121440402 is a deficient number, since it is larger than the sum of its proper divisors (560720204).

1121440402 is an equidigital number, since it uses as much as digits as its factorization.

1121440402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560720203.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1121440402 is about 33487.9142676877. The cubic root of 1121440402 is about 1038.9438248273.

Adding to 1121440402 its reverse (2040441211), we get a palindrome (3161881613).

The spelling of 1121440402 in words is "one billion, one hundred twenty-one million, four hundred forty thousand, four hundred two".