1400407 has 4 divisors (see below), whose sum is σ = 1407256. Its totient is φ = 1393560.

The previous prime is 1400387. The next prime is 1400411. The reversal of 1400407 is 7040041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1400407 - 2⁷ = 1400279 is a prime.

It is a super-2 number, since 2×1400407² = 3922279531298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3108 + ... + 3529.

It is an arithmetic number, because the mean of its divisors is an integer number (351814).

2^1400407 is an apocalyptic number.

1400407 is a deficient number, since it is larger than the sum of its proper divisors (6849).

1400407 is an equidigital number, since it uses as much as digits as its factorization.

1400407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6848.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 1400407 is about 1183.3879330127. The cubic root of 1400407 is about 111.8797337864.

Adding to 1400407 its reverse (7040041), we get a palindrome (8440448).

The spelling of 1400407 in words is "one million, four hundred thousand, four hundred seven".