1243021794 has 32 divisors (see below), whose sum is σ = 2889354240. Its totient is φ = 349128912.

The previous prime is 1243021777. The next prime is 1243021799. The reversal of 1243021794 is 4971203421.

It is not an unprimeable number, because it can be changed into a prime (1243021799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248334 + ... + 253289.

It is an arithmetic number, because the mean of its divisors is an integer number (90292320).

Almost surely, 2^1243021794 is an apocalyptic number.

1243021794 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1243021794 is an abundant number, since it is smaller than the sum of its proper divisors (1646332446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1243021794 is a wasteful number, since it uses less digits than its factorization.

1243021794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501694.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 1243021794 is about 35256.5142065973. The cubic root of 1243021794 is about 1075.2090580253.

The spelling of 1243021794 in words is "one billion, two hundred forty-three million, twenty-one thousand, seven hundred ninety-four".