1187325220 has 48 divisors (see below), whose sum is σ = 2644645248. Its totient is φ = 446215680.

The previous prime is 1187325173. The next prime is 1187325241. The reversal of 1187325220 is 225237811.

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, 215905 + ... + 221335.

It is an arithmetic number, because the mean of its divisors is an integer number (55096776).

Almost surely, 2^1187325220 is an apocalyptic number.

1187325220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1187325220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1322322624).

1187325220 is an abundant number, since it is smaller than the sum of its proper divisors (1457320028).

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

1187325220 is a wasteful number, since it uses less digits than its factorization.

1187325220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6100 (or 6098 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 1187325220 is about 34457.5858121256. The cubic root of 1187325220 is about 1058.9039400237.

The spelling of 1187325220 in words is "one billion, one hundred eighty-seven million, three hundred twenty-five thousand, two hundred twenty".