1427128531 has 4 divisors (see below), whose sum is σ = 1432171672. Its totient is φ = 1422085392.

The previous prime is 1427128481. The next prime is 1427128537. The reversal of 1427128531 is 1358217241.

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 1427128531 - 2¹³ = 1427120339 is a prime.

It is a super-2 number, since 2×1427128531² = 4073391687988435922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1427128537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2521146 + ... + 2521711.

It is an arithmetic number, because the mean of its divisors is an integer number (358042918).

Almost surely, 2^1427128531 is an apocalyptic number.

1427128531 is a deficient number, since it is larger than the sum of its proper divisors (5043141).

1427128531 is an equidigital number, since it uses as much as digits as its factorization.

1427128531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5043140.

The product of its digits is 13440, while the sum is 34.

The square root of 1427128531 is about 37777.3547379909. The cubic root of 1427128531 is about 1125.8685719668.

The spelling of 1427128531 in words is "one billion, four hundred twenty-seven million, one hundred twenty-eight thousand, five hundred thirty-one".