1427551 has 2 divisors, whose sum is σ = 1427552. Its totient is φ = 1427550.

The previous prime is 1427539. The next prime is 1427561. The reversal of 1427551 is 1557241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1427551 - 2⁹ = 1427039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1427501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 713775 + 713776.

It is an arithmetic number, because the mean of its divisors is an integer number (713776).

2^1427551 is an apocalyptic number.

1427551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1427551 is an equidigital number, since it uses as much as digits as its factorization.

1427551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1400, while the sum is 25.

The square root of 1427551 is about 1194.8016571800. The cubic root of 1427551 is about 112.5979656949.

The spelling of 1427551 in words is "one million, four hundred twenty-seven thousand, five hundred fifty-one".