1227123540 has 48 divisors (see below), whose sum is σ = 3817719360. Its totient is φ = 327232800.

The previous prime is 1227123539. The next prime is 1227123571. The reversal of 1227123540 is 453217221.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1135686 + ... + 1136765.

It is an arithmetic number, because the mean of its divisors is an integer number (79535820).

Almost surely, 2^1227123540 is an apocalyptic number.

1227123540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1227123540 is an abundant number, since it is smaller than the sum of its proper divisors (2590595820).

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

1227123540 is a wasteful number, since it uses less digits than its factorization.

1227123540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272469 (or 2272461 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1227123540 is about 35030.3231500938. The cubic root of 1227123540 is about 1070.6053988087.

The spelling of 1227123540 in words is "one billion, two hundred twenty-seven million, one hundred twenty-three thousand, five hundred forty".