1243745140 has 24 divisors (see below), whose sum is σ = 2849307552. Its totient is φ = 452270880.

The previous prime is 1243745101. The next prime is 1243745183. The reversal of 1243745140 is 415473421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2826474 + ... + 2826913.

It is an arithmetic number, because the mean of its divisors is an integer number (118721148).

Almost surely, 2^1243745140 is an apocalyptic number.

1243745140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243745140 is an abundant number, since it is smaller than the sum of its proper divisors (1605562412).

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

1243745140 is a wasteful number, since it uses less digits than its factorization.

1243745140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5653407 (or 5653405 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 1243745140 is about 35266.7710458443. The cubic root of 1243745140 is about 1075.4175814156.

The spelling of 1243745140 in words is "one billion, two hundred forty-three million, seven hundred forty-five thousand, one hundred forty".