1921435412 has 24 divisors (see below), whose sum is σ = 3647612136. Its totient is φ = 880339968.

The previous prime is 1921435381. The next prime is 1921435423. The reversal of 1921435412 is 2145341291.

It can be written as a sum of positive squares in 4 ways, for example, as 387459856 + 1533975556 = 19684^2 + 39166^2 .

It is a congruent number.

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, 127733 + ... + 141980.

It is an arithmetic number, because the mean of its divisors is an integer number (151983839).

Almost surely, 2^1921435412 is an apocalyptic number.

It is an amenable number.

1921435412 is a deficient number, since it is larger than the sum of its proper divisors (1726176724).

1921435412 is a wasteful number, since it uses less digits than its factorization.

1921435412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269867 (or 269865 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 1921435412 is about 43834.1808637962. The cubic root of 1921435412 is about 1243.2026584788.

The spelling of 1921435412 in words is "one billion, nine hundred twenty-one million, four hundred thirty-five thousand, four hundred twelve".