1197231885 has 24 divisors (see below), whose sum is σ = 2197274040. Its totient is φ = 600963072.

The previous prime is 1197231869. The next prime is 1197231887. The reversal of 1197231885 is 5881327911.

It can be written as a sum of positive squares in 4 ways, for example, as 594725769 + 602506116 = 24387^2 + 24546^2 .

It is not a de Polignac number, because 1197231885 - 2⁴ = 1197231869 is a prime.

It is a super-3 number, since 3×1197231885³ (a number of 28 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1197231885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1197231887) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 781740 + ... + 783269.

It is an arithmetic number, because the mean of its divisors is an integer number (91553085).

Almost surely, 2^1197231885 is an apocalyptic number.

1197231885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1197231885 is a deficient number, since it is larger than the sum of its proper divisors (1000042155).

1197231885 is a wasteful number, since it uses less digits than its factorization.

1197231885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565037 (or 1565034 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 1197231885 is about 34601.0387849845. The cubic root of 1197231885 is about 1061.8408397782.

The spelling of 1197231885 in words is "one billion, one hundred ninety-seven million, two hundred thirty-one thousand, eight hundred eighty-five".