1123421402 has 16 divisors (see below), whose sum is σ = 1728882792. Its totient is φ = 547169280.

The previous prime is 1123421393. The next prime is 1123421413. The reversal of 1123421402 is 2041243211.

It can be written as a sum of positive squares in 4 ways, for example, as 634082761 + 489338641 = 25181^2 + 22121^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45008 + ... + 65364.

Almost surely, 2^1123421402 is an apocalyptic number.

1123421402 is a deficient number, since it is larger than the sum of its proper divisors (605461390).

1123421402 is a wasteful number, since it uses less digits than its factorization.

1123421402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21073.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1123421402 is about 33517.4790519812. The cubic root of 1123421402 is about 1039.5552221606. Note that the first 3 decimals are identical.

Adding to 1123421402 its reverse (2041243211), we get a palindrome (3164664613).

The spelling of 1123421402 in words is "one billion, one hundred twenty-three million, four hundred twenty-one thousand, four hundred two".