127742220 has 36 divisors (see below), whose sum is σ = 387485280. Its totient is φ = 34064544.

The previous prime is 127742213. The next prime is 127742231. The reversal of 127742220 is 22247721.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 354660 + ... + 355019.

It is an arithmetic number, because the mean of its divisors is an integer number (10763480).

Almost surely, 2^127742220 is an apocalyptic number.

127742220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127742220 is an abundant number, since it is smaller than the sum of its proper divisors (259743060).

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

127742220 is a wasteful number, since it uses less digits than its factorization.

127742220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709694 (or 709689 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 127742220 is about 11302.3103832800. The cubic root of 127742220 is about 503.6298775417.

Adding to 127742220 its reverse (22247721), we get a palindrome (149989941).

The spelling of 127742220 in words is "one hundred twenty-seven million, seven hundred forty-two thousand, two hundred twenty".