1427128231 has 2 divisors, whose sum is σ = 1427128232. Its totient is φ = 1427128230.

The previous prime is 1427128211. The next prime is 1427128243. The reversal of 1427128231 is 1328217241.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1427128231 is a prime.

It is a super-2 number, since 2×1427128231² = 4073389975434378722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1427128193 and 1427128202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1427128201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 713564115 + 713564116.

It is an arithmetic number, because the mean of its divisors is an integer number (713564116).

Almost surely, 2^1427128231 is an apocalyptic number.

1427128231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1427128231 is an equidigital number, since it uses as much as digits as its factorization.

1427128231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

The square root of 1427128231 is about 37777.3507673579. The cubic root of 1427128231 is about 1125.8684930763.

The spelling of 1427128231 in words is "one billion, four hundred twenty-seven million, one hundred twenty-eight thousand, two hundred thirty-one".