127789942 has 12 divisors (see below), whose sum is σ = 222980580. Its totient is φ = 54767076.

The previous prime is 127789939. The next prime is 127789957. The reversal of 127789942 is 249987721.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 651892 + ... + 652087.

It is an arithmetic number, because the mean of its divisors is an integer number (18581715).

Almost surely, 2^127789942 is an apocalyptic number.

127789942 is a deficient number, since it is larger than the sum of its proper divisors (95190638).

127789942 is a wasteful number, since it uses less digits than its factorization.

127789942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303995 (or 1303988 counting only the distinct ones).

The product of its digits is 508032, while the sum is 49.

The square root of 127789942 is about 11304.4213474198. The cubic root of 127789942 is about 503.6925851642.

It can be divided in two parts, 1277 and 89942, that added together give a palindrome (91219).

The spelling of 127789942 in words is "one hundred twenty-seven million, seven hundred eighty-nine thousand, nine hundred forty-two".