1242543764 has 36 divisors (see below), whose sum is σ = 2759420160. Its totient is φ = 484107120.

The previous prime is 1242543761. The next prime is 1242543803. The reversal of 1242543764 is 4673452421.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242543761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 286004 + ... + 290315.

It is an arithmetic number, because the mean of its divisors is an integer number (76650560).

Almost surely, 2^1242543764 is an apocalyptic number.

1242543764 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1242543764 is an abundant number, since it is smaller than the sum of its proper divisors (1516876396).

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

1242543764 is a wasteful number, since it uses less digits than its factorization.

1242543764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576348 (or 576339 counting only the distinct ones).

The product of its digits is 161280, while the sum is 38.

The square root of 1242543764 is about 35249.7342401329. The cubic root of 1242543764 is about 1075.0712089840.

The spelling of 1242543764 in words is "one billion, two hundred forty-two million, five hundred forty-three thousand, seven hundred sixty-four".