1400857 has 4 divisors (see below), whose sum is σ = 1438756. Its totient is φ = 1362960.

The previous prime is 1400821. The next prime is 1400863. The reversal of 1400857 is 7580041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1320201 + 80656 = 1149^2 + 284^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400857 - 2¹⁹ = 876569 is a prime.

It is a Duffinian number.

1400857 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1400807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18894 + ... + 18967.

It is an arithmetic number, because the mean of its divisors is an integer number (359689).

2^1400857 is an apocalyptic number.

It is an amenable number.

1400857 is a deficient number, since it is larger than the sum of its proper divisors (37899).

1400857 is an equidigital number, since it uses as much as digits as its factorization.

1400857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37898.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1400857 is about 1183.5780498134. The cubic root of 1400857 is about 111.8917161335.

Adding to 1400857 its reverse (7580041), we get a palindrome (8980898).

The spelling of 1400857 in words is "one million, four hundred thousand, eight hundred fifty-seven".