1400145 has 16 divisors (see below), whose sum is σ = 2255040. Its totient is φ = 741824.

The previous prime is 1400143. The next prime is 1400159. The reversal of 1400145 is 5410041.

It is a cyclic number.

It is not a de Polignac number, because 1400145 - 2¹ = 1400143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an Ulam number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3862 + ... + 4208.

It is an arithmetic number, because the mean of its divisors is an integer number (140940).

2^1400145 is an apocalyptic number.

1400145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1400145 is a deficient number, since it is larger than the sum of its proper divisors (854895).

1400145 is a wasteful number, since it uses less digits than its factorization.

1400145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1400145 is about 1183.2772287169. The cubic root of 1400145 is about 111.8727562152.

Adding to 1400145 its reverse (5410041), we get a palindrome (6810186).

The spelling of 1400145 in words is "one million, four hundred thousand, one hundred forty-five".