1121620442 has 8 divisors (see below), whose sum is σ = 1727901876. Its totient is φ = 545653152.

The previous prime is 1121620429. The next prime is 1121620447. The reversal of 1121620442 is 2440261211.

It can be written as a sum of positive squares in 2 ways, for example, as 1114958881 + 6661561 = 33391^2 + 2581^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1121620447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7578443 + ... + 7578590.

Almost surely, 2^1121620442 is an apocalyptic number.

1121620442 is a deficient number, since it is larger than the sum of its proper divisors (606281434).

1121620442 is a wasteful number, since it uses less digits than its factorization.

1121620442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15157072.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1121620442 is about 33490.6022937779. The cubic root of 1121620442 is about 1038.9994204216. Note that the first 3 decimals are identical.

Adding to 1121620442 its reverse (2440261211), we get a palindrome (3561881653).

The spelling of 1121620442 in words is "one billion, one hundred twenty-one million, six hundred twenty thousand, four hundred forty-two".