1391407 has 2 divisors, whose sum is σ = 1391408. Its totient is φ = 1391406.

The previous prime is 1391393. The next prime is 1391413. The reversal of 1391407 is 7041931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1391407 - 2¹⁵ = 1358639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1391447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695703 + 695704.

It is an arithmetic number, because the mean of its divisors is an integer number (695704).

2^1391407 is an apocalyptic number.

1391407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391407 is an equidigital number, since it uses as much as digits as its factorization.

1391407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 1391407 is about 1179.5791622439. The cubic root of 1391407 is about 111.6395459000.

The spelling of 1391407 in words is "one million, three hundred ninety-one thousand, four hundred seven".