1400144 has 10 divisors (see below), whose sum is σ = 2712810. Its totient is φ = 700064.

The previous prime is 1400143. The next prime is 1400159. The reversal of 1400144 is 4410041.

It can be written as a sum of positive squares in only one way, i.e., 1392400 + 7744 = 1180^2 + 88^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43739 + ... + 43770.

It is an arithmetic number, because the mean of its divisors is an integer number (271281).

2^1400144 is an apocalyptic number.

It is an amenable number.

1400144 is a deficient number, since it is larger than the sum of its proper divisors (1312666).

1400144 is an equidigital number, since it uses as much as digits as its factorization.

1400144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87517 (or 87511 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1400144 is about 1183.2768061616. The cubic root of 1400144 is about 111.8727295816.

Adding to 1400144 its reverse (4410041), we get a palindrome (5810185).

The spelling of 1400144 in words is "one million, four hundred thousand, one hundred forty-four".