1406557 has 2 divisors, whose sum is σ = 1406558. Its totient is φ = 1406556.

The previous prime is 1406549. The next prime is 1406591. The reversal of 1406557 is 7556041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 857476 + 549081 = 926^2 + 741^2 .

It is a cyclic number.

It is not a de Polignac number, because 1406557 - 2³ = 1406549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1406357) 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, 703278 + 703279.

It is an arithmetic number, because the mean of its divisors is an integer number (703279).

2^1406557 is an apocalyptic number.

It is an amenable number.

1406557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406557 is an equidigital number, since it uses as much as digits as its factorization.

1406557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 1406557 is about 1185.9835580648. The cubic root of 1406557 is about 112.0432709078.

The spelling of 1406557 in words is "one million, four hundred six thousand, five hundred fifty-seven".