1427999 has 2 divisors, whose sum is σ = 1428000. Its totient is φ = 1427998.

The previous prime is 1427969. The next prime is 1428013. The reversal of 1427999 is 9997241.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1427999 - 2¹⁶ = 1362463 is a prime.

It is a super-2 number, since 2×1427999² = 4078362288002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1427969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 713999 + 714000.

It is an arithmetic number, because the mean of its divisors is an integer number (714000).

2^1427999 is an apocalyptic number.

1427999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1427999 is an equidigital number, since it uses as much as digits as its factorization.

1427999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 41.

The square root of 1427999 is about 1194.9891212894. The cubic root of 1427999 is about 112.6097431172.

The spelling of 1427999 in words is "one million, four hundred twenty-seven thousand, nine hundred ninety-nine".