1641121402 has 16 divisors (see below), whose sum is σ = 2528060832. Its totient is φ = 798572880.

The previous prime is 1641121373. The next prime is 1641121411. The reversal of 1641121402 is 2041211461.

It is a super-2 number, since 2×1641121402² = 5386558912204891208, which contains 22 as substring.

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, 10624 + ... + 58267.

It is an arithmetic number, because the mean of its divisors is an integer number (158003802).

Almost surely, 2^1641121402 is an apocalyptic number.

1641121402 is a deficient number, since it is larger than the sum of its proper divisors (886939430).

1641121402 is a wasteful number, since it uses less digits than its factorization.

1641121402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69213.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1641121402 is about 40510.7566209272. The cubic root of 1641121402 is about 1179.5424353496.

Adding to 1641121402 its reverse (2041211461), we get a palindrome (3682332863).

The spelling of 1641121402 in words is "one billion, six hundred forty-one million, one hundred twenty-one thousand, four hundred two".