1243589420 has 12 divisors (see below), whose sum is σ = 2611537824. Its totient is φ = 497435760.

The previous prime is 1243589411. The next prime is 1243589441. The reversal of 1243589420 is 249853421.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31089716 + ... + 31089755.

It is an arithmetic number, because the mean of its divisors is an integer number (217628152).

Almost surely, 2^1243589420 is an apocalyptic number.

1243589420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243589420 is an abundant number, since it is smaller than the sum of its proper divisors (1367948404).

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

1243589420 is a wasteful number, since it uses less digits than its factorization.

1243589420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62179480 (or 62179478 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 1243589420 is about 35264.5632327979. The cubic root of 1243589420 is about 1075.3726978861.

The spelling of 1243589420 in words is "one billion, two hundred forty-three million, five hundred eighty-nine thousand, four hundred twenty".