1244534540 has 24 divisors (see below), whose sum is σ = 2636655840. Its totient is φ = 493407488.

The previous prime is 1244534539. The next prime is 1244534563. The reversal of 1244534540 is 454354421.

It is a junction number, because it is equal to n+sod(n) for n = 1244534497 and 1244534506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273080 + ... + 277599.

It is an arithmetic number, because the mean of its divisors is an integer number (109860660).

Almost surely, 2^1244534540 is an apocalyptic number.

1244534540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244534540 is an abundant number, since it is smaller than the sum of its proper divisors (1392121300).

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

1244534540 is a wasteful number, since it uses less digits than its factorization.

1244534540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550801 (or 550799 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

The square root of 1244534540 is about 35277.9611088850. The cubic root of 1244534540 is about 1075.6450543573.

Adding to 1244534540 its reverse (454354421), we get a palindrome (1698888961).

The spelling of 1244534540 in words is "one billion, two hundred forty-four million, five hundred thirty-four thousand, five hundred forty".