1243112650 has 24 divisors (see below), whose sum is σ = 2490051564. Its totient is φ = 458995200.

The previous prime is 1243112621. The next prime is 1243112653. The reversal of 1243112650 is 562113421.

It is a happy number.

1243112650 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 316092841 + 927019809 = 17779^2 + 30447^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1243112653) 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, 955591 + ... + 956890.

Almost surely, 2^1243112650 is an apocalyptic number.

1243112650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1243112650 is an abundant number, since it is smaller than the sum of its proper divisors (1246938914).

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

1243112650 is a wasteful number, since it uses less digits than its factorization.

1243112650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912506 (or 1912501 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1243112650 is about 35257.8026825269. The cubic root of 1243112650 is about 1075.2352540836.

The spelling of 1243112650 in words is "one billion, two hundred forty-three million, one hundred twelve thousand, six hundred fifty".