1400020 has 12 divisors (see below), whose sum is σ = 2940084. Its totient is φ = 560000.

The previous prime is 1400017. The next prime is 1400023. The reversal of 1400020 is 200041.

It is an interprime number because it is at equal distance from previous prime (1400017) and next prime (1400023).

It can be written as a sum of positive squares in 2 ways, for example, as 887364 + 512656 = 942^2 + 716^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1399976 and 1400012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400023) 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 3 ways as a sum of consecutive naturals, for example, 34981 + ... + 35020.

It is an arithmetic number, because the mean of its divisors is an integer number (245007).

2^1400020 is an apocalyptic number.

1400020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400020 is an abundant number, since it is smaller than the sum of its proper divisors (1540064).

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

1400020 is a wasteful number, since it uses less digits than its factorization.

1400020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70010 (or 70008 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 1400020 is about 1183.2244081323. The cubic root of 1400020 is about 111.8694269146.

Adding to 1400020 its reverse (200041), we get a palindrome (1600061).

The spelling of 1400020 in words is "one million, four hundred thousand, twenty".