1248156340 has 12 divisors (see below), whose sum is σ = 2621128356. Its totient is φ = 499262528.

The previous prime is 1248156331. The next prime is 1248156383. The reversal of 1248156340 is 436518421.

It can be written as a sum of positive squares in 2 ways, for example, as 473758756 + 774397584 = 21766^2 + 27828^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1248156296 and 1248156305.

It is a congruent number.

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, 31203889 + ... + 31203928.

It is an arithmetic number, because the mean of its divisors is an integer number (218427363).

Almost surely, 2^1248156340 is an apocalyptic number.

1248156340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1248156340 is an abundant number, since it is smaller than the sum of its proper divisors (1372972016).

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

1248156340 is a wasteful number, since it uses less digits than its factorization.

1248156340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62407826 (or 62407824 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 1248156340 is about 35329.2561484105. The cubic root of 1248156340 is about 1076.6874784174.

The spelling of 1248156340 in words is "one billion, two hundred forty-eight million, one hundred fifty-six thousand, three hundred forty".