1243290472 has 8 divisors (see below), whose sum is σ = 2331169650. Its totient is φ = 621645232.

The previous prime is 1243290467. The next prime is 1243290473. The reversal of 1243290472 is 2740923421.

It can be written as a sum of positive squares in only one way, i.e., 1170597796 + 72692676 = 34214^2 + 8526^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1243290473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77705647 + ... + 77705662.

Almost surely, 2^1243290472 is an apocalyptic number.

It is an amenable number.

1243290472 is a deficient number, since it is larger than the sum of its proper divisors (1087879178).

1243290472 is a wasteful number, since it uses less digits than its factorization.

1243290472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155411315 (or 155411311 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 1243290472 is about 35260.3243320308. The cubic root of 1243290472 is about 1075.2865209223.

It can be divided in two parts, 124 and 3290472, that added together give a square (3290596 = 1814²).

The spelling of 1243290472 in words is "one billion, two hundred forty-three million, two hundred ninety thousand, four hundred seventy-two".