1210540155240 has 128 divisors (see below), whose sum is σ = 4006365753600. Its totient is φ = 290711316480.

The previous prime is 1210540155239. The next prime is 1210540155247. The reversal of 1210540155240 is 425510450121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1210540155198 and 1210540155207.

It is not an unprimeable number, because it can be changed into a prime (1210540155247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9399300 + ... + 9527219.

It is an arithmetic number, because the mean of its divisors is an integer number (31299732450).

Almost surely, 2^{1210540155240} is an apocalyptic number.

1210540155240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210540155240 is an abundant number, since it is smaller than the sum of its proper divisors (2795825598360).

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

1210540155240 is a wasteful number, since it uses less digits than its factorization.

1210540155240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18926587 (or 18926583 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The spelling of 1210540155240 in words is "one trillion, two hundred ten billion, five hundred forty million, one hundred fifty-five thousand, two hundred forty".