1400634 has 12 divisors (see below), whose sum is σ = 3034746. Its totient is φ = 466872.

The previous prime is 1400627. The next prime is 1400653. The reversal of 1400634 is 4360041.

It can be written as a sum of positive squares in only one way, i.e., 815409 + 585225 = 903^2 + 765^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 77813 = 1400634 / (1 + 4 + 0 + 0 + 6 + 3 + 4).

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 38889 + ... + 38924.

2^1400634 is an apocalyptic number.

1400634 is an abundant number, since it is smaller than the sum of its proper divisors (1634112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1400634 is a wasteful number, since it uses less digits than its factorization.

1400634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77821 (or 77818 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1400634 is about 1183.4838401939. The cubic root of 1400634 is about 111.8857785356.

Adding to 1400634 its reverse (4360041), we get a palindrome (5760675).

The spelling of 1400634 in words is "one million, four hundred thousand, six hundred thirty-four".