1240155532 has 48 divisors (see below), whose sum is σ = 2713116672. Its totient is φ = 481870080.

The previous prime is 1240155493. The next prime is 1240155541. The reversal of 1240155532 is 2355510421.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 1240155532.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112708 + ... + 123220.

It is an arithmetic number, because the mean of its divisors is an integer number (56523264).

Almost surely, 2^1240155532 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1240155532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1356558336).

1240155532 is an abundant number, since it is smaller than the sum of its proper divisors (1472961140).

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

1240155532 is a wasteful number, since it uses less digits than its factorization.

1240155532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10918 (or 10916 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1240155532 is about 35215.8420600729. The cubic root of 1240155532 is about 1074.3819867975.

Adding to 1240155532 its reverse (2355510421), we get a palindrome (3595665953).

The spelling of 1240155532 in words is "one billion, two hundred forty million, one hundred fifty-five thousand, five hundred thirty-two".