1427391 has 24 divisors (see below), whose sum is σ = 2387840. Its totient is φ = 804816.

The previous prime is 1427389. The next prime is 1427399. The reversal of 1427391 is 1937241.

It is not a de Polignac number, because 1427391 - 2¹ = 1427389 is a prime.

1427391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427399) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8676 + ... + 8838.

2^1427391 is an apocalyptic number.

1427391 is a deficient number, since it is larger than the sum of its proper divisors (960449).

1427391 is a wasteful number, since it uses less digits than its factorization.

1427391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 312 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 1427391 is about 1194.7346985837. The cubic root of 1427391 is about 112.5937588755.

The spelling of 1427391 in words is "one million, four hundred twenty-seven thousand, three hundred ninety-one".