1400209 has 4 divisors (see below), whose sum is σ = 1432816. Its totient is φ = 1367604.

The previous prime is 1400197. The next prime is 1400249. The reversal of 1400209 is 9020041.

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.

It is a cyclic number.

It is not a de Polignac number, because 1400209 - 2⁷ = 1400081 is a prime.

It is a Duffinian number.

1400209 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1400192 and 1400201.

It is not an unprimeable number, because it can be changed into a prime (1400249) 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, 16239 + ... + 16324.

It is an arithmetic number, because the mean of its divisors is an integer number (358204).

2^1400209 is an apocalyptic number.

It is an amenable number.

1400209 is a deficient number, since it is larger than the sum of its proper divisors (32607).

1400209 is an equidigital number, since it uses as much as digits as its factorization.

1400209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32606.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1400209 is about 1183.3042719436. The cubic root of 1400209 is about 111.8744607404.

The spelling of 1400209 in words is "one million, four hundred thousand, two hundred nine".