127161820 has 24 divisors (see below), whose sum is σ = 271420128. Its totient is φ = 50030400.

The previous prime is 127161817. The next prime is 127161829. The reversal of 127161820 is 28161721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127161829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50896 + ... + 53335.

It is an arithmetic number, because the mean of its divisors is an integer number (11309172).

Almost surely, 2^127161820 is an apocalyptic number.

127161820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127161820 is an abundant number, since it is smaller than the sum of its proper divisors (144258308).

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

127161820 is a wasteful number, since it uses less digits than its factorization.

127161820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104301 (or 104299 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 127161820 is about 11276.6049855442. The cubic root of 127161820 is about 502.8659677373.

Subtracting from 127161820 its reverse (28161721), we obtain a palindrome (99000099).

The spelling of 127161820 in words is "one hundred twenty-seven million, one hundred sixty-one thousand, eight hundred twenty".