1400405 has 8 divisors (see below), whose sum is σ = 1687200. Its totient is φ = 1115856.

The previous prime is 1400387. The next prime is 1400411. The reversal of 1400405 is 5040041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1400405 - 2¹⁰ = 1399381 is a prime.

It is a super-2 number, since 2×1400405² = 3922268328050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1400405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1526 + ... + 2264.

It is an arithmetic number, because the mean of its divisors is an integer number (210900).

2^1400405 is an apocalyptic number.

It is an amenable number.

1400405 is a deficient number, since it is larger than the sum of its proper divisors (286795).

1400405 is an equidigital number, since it uses as much as digits as its factorization.

1400405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1400405 is about 1183.3870879809. The cubic root of 1400405 is about 111.8796805258.

Adding to 1400405 its reverse (5040041), we get a palindrome (6440446).

The spelling of 1400405 in words is "one million, four hundred thousand, four hundred five".