1201555332 has 18 divisors (see below), whose sum is σ = 3037264958. Its totient is φ = 400518432.

The previous prime is 1201555297. The next prime is 1201555363. The reversal of 1201555332 is 2335551021.

It is a happy number.

1201555332 is a `hidden beast` number, since 120 + 1 + 5 + 5 + 533 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 643839876 + 557715456 = 25374^2 + 23616^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 1201555296 and 1201555305.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16688233 + ... + 16688304.

Almost surely, 2^1201555332 is an apocalyptic number.

1201555332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1201555332 is an abundant number, since it is smaller than the sum of its proper divisors (1835709626).

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

1201555332 is a wasteful number, since it uses less digits than its factorization.

1201555332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33376547 (or 33376542 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 1201555332 is about 34663.4581656245. The cubic root of 1201555332 is about 1063.1174784401.

The spelling of 1201555332 in words is "one billion, two hundred one million, five hundred fifty-five thousand, three hundred thirty-two".