127643131 has 16 divisors (see below), whose sum is σ = 159644160. Its totient is φ = 99146880.

The previous prime is 127643129. The next prime is 127643141. The reversal of 127643131 is 131346721.

It is not a de Polignac number, because 127643131 - 2¹ = 127643129 is a prime.

It is a super-2 number, since 2×127643131² = 32585537782966322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 127643131.

It is not an unprimeable number, because it can be changed into a prime (127643101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23490 + ... + 28408.

It is an arithmetic number, because the mean of its divisors is an integer number (9977760).

Almost surely, 2^127643131 is an apocalyptic number.

127643131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

127643131 is a deficient number, since it is larger than the sum of its proper divisors (32001029).

127643131 is a wasteful number, since it uses less digits than its factorization.

127643131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5274.

The product of its digits is 3024, while the sum is 28.

The square root of 127643131 is about 11297.9259601044. The cubic root of 127643131 is about 503.4996227990.

Adding to 127643131 its reverse (131346721), we get a palindrome (258989852).

The spelling of 127643131 in words is "one hundred twenty-seven million, six hundred forty-three thousand, one hundred thirty-one".