127428131 has 4 divisors (see below), whose sum is σ = 128140200. Its totient is φ = 126716064.

The previous prime is 127428121. The next prime is 127428137. The reversal of 127428131 is 131824721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 127428131 - 2¹⁴ = 127411747 is a prime.

It is a super-2 number, since 2×127428131² = 32475857140306322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 127428094 and 127428103.

It is not an unprimeable number, because it can be changed into a prime (127428137) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 355766 + ... + 356123.

It is an arithmetic number, because the mean of its divisors is an integer number (32035050).

Almost surely, 2^127428131 is an apocalyptic number.

127428131 is a deficient number, since it is larger than the sum of its proper divisors (712069).

127428131 is an equidigital number, since it uses as much as digits as its factorization.

127428131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712068.

The product of its digits is 2688, while the sum is 29.

The square root of 127428131 is about 11288.4069292350. The cubic root of 127428131 is about 503.2167684207.

The spelling of 127428131 in words is "one hundred twenty-seven million, four hundred twenty-eight thousand, one hundred thirty-one".