1401857 has 2 divisors, whose sum is σ = 1401858. Its totient is φ = 1401856.

The previous prime is 1401823. The next prime is 1401937. The reversal of 1401857 is 7581041.

It is a Cunningham number, because it is equal to 1184²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1401856 + 1 = 1184^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401857 - 2⁶ = 1401793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1401817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700928 + 700929.

It is an arithmetic number, because the mean of its divisors is an integer number (700929).

2^1401857 is an apocalyptic number.

It is an amenable number.

1401857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401857 is an equidigital number, since it uses as much as digits as its factorization.

1401857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 1401857 is about 1184.0004222972. Note that the first 3 decimals coincide. The cubic root of 1401857 is about 111.9183343875.

Adding to 1401857 its reverse (7581041), we get a palindrome (8982898).

The spelling of 1401857 in words is "one million, four hundred one thousand, eight hundred fifty-seven".