1406857 has 2 divisors, whose sum is σ = 1406858. Its totient is φ = 1406856.

The previous prime is 1406849. The next prime is 1406861. The reversal of 1406857 is 7586041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1301881 + 104976 = 1141^2 + 324^2 .

It is a cyclic number.

It is not a de Polignac number, because 1406857 - 2³ = 1406849 is a prime.

It is a Chen prime.

1406857 is a lucky number.

It is a plaindrome in base 14 and base 16.

It is not a weakly prime, because it can be changed into another prime (1406807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703428 + 703429.

It is an arithmetic number, because the mean of its divisors is an integer number (703429).

2^1406857 is an apocalyptic number.

It is an amenable number.

1406857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406857 is an equidigital number, since it uses as much as digits as its factorization.

1406857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 1406857 is about 1186.1100286230. The cubic root of 1406857 is about 112.0512361240.

The spelling of 1406857 in words is "one million, four hundred six thousand, eight hundred fifty-seven".