1201385500 has 48 divisors (see below), whose sum is σ = 2998666944. Its totient is φ = 411902400.

The previous prime is 1201385491. The next prime is 1201385539. The reversal of 1201385500 is 55831021.

It is a happy number.

It is a super-2 number, since 2×1201385500² = 2886654239220500000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

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, 168127 + ... + 175126.

It is an arithmetic number, because the mean of its divisors is an integer number (62472228).

Almost surely, 2^1201385500 is an apocalyptic number.

1201385500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201385500 is an abundant number, since it is smaller than the sum of its proper divisors (1797281444).

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

1201385500 is a wasteful number, since it uses less digits than its factorization.

1201385500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343279 (or 343267 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 1201385500 is about 34661.0083523258. The cubic root of 1201385500 is about 1063.0673878422.

The spelling of 1201385500 in words is "one billion, two hundred one million, three hundred eighty-five thousand, five hundred".