127642686 has 32 divisors (see below), whose sum is σ = 274987008. Its totient is φ = 39383520.

The previous prime is 127642679. The next prime is 127642693. The reversal of 127642686 is 686246721.

It is an interprime number because it is at equal distance from previous prime (127642679) and next prime (127642693).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10641 + ... + 19196.

It is an arithmetic number, because the mean of its divisors is an integer number (8593344).

Almost surely, 2^127642686 is an apocalyptic number.

127642686 is an abundant number, since it is smaller than the sum of its proper divisors (147344322).

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

127642686 is a wasteful number, since it uses less digits than its factorization.

127642686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29896.

The product of its digits is 193536, while the sum is 42.

The square root of 127642686 is about 11297.9062662070. The cubic root of 127642686 is about 503.4990376844.

The spelling of 127642686 in words is "one hundred twenty-seven million, six hundred forty-two thousand, six hundred eighty-six".