1400142857 has 4 divisors (see below), whose sum is σ = 1400256000. Its totient is φ = 1400029716.

The previous prime is 1400142841. The next prime is 1400142859. The reversal of 1400142857 is 7582410041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7582410041 = 4507 ⋅1682363.

It is a cyclic number.

It is not a de Polignac number, because 1400142857 - 2⁴ = 1400142841 is a prime.

It is a Duffinian number.

1400142857 is a modest number, since divided by 142857 gives 1400 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1400142859) 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, 35357 + ... + 63642.

It is an arithmetic number, because the mean of its divisors is an integer number (350064000).

Almost surely, 2^1400142857 is an apocalyptic number.

It is an amenable number.

1400142857 is a deficient number, since it is larger than the sum of its proper divisors (113143).

1400142857 is an equidigital number, since it uses as much as digits as its factorization.

1400142857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113142.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 1400142857 is about 37418.4828260046. The cubic root of 1400142857 is about 1118.7269913935.

Adding to 1400142857 its reverse (7582410041), we get a palindrome (8982552898).

The spelling of 1400142857 in words is "one billion, four hundred million, one hundred forty-two thousand, eight hundred fifty-seven".