1400345 has 4 divisors (see below), whose sum is σ = 1680420. Its totient is φ = 1120272.

The previous prime is 1400327. The next prime is 1400353. The reversal of 1400345 is 5430041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5430041 = 1493 ⋅3637.

It can be written as a sum of positive squares in 2 ways, for example, as 802816 + 597529 = 896^2 + 773^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400345 - 2¹⁴ = 1383961 is a prime.

It is a super-2 number, since 2×1400345² = 3921932238050, which contains 22 as substring.

It is a nialpdrome in base 11.

It is an unprimeable number.

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, 140030 + ... + 140039.

It is an arithmetic number, because the mean of its divisors is an integer number (420105).

2^1400345 is an apocalyptic number.

It is an amenable number.

1400345 is a deficient number, since it is larger than the sum of its proper divisors (280075).

1400345 is an equidigital number, since it uses as much as digits as its factorization.

1400345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280074.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 1400345 is about 1183.3617367483. The cubic root of 1400345 is about 111.8780826840.

Adding to 1400345 its reverse (5430041), we get a palindrome (6830386).

The spelling of 1400345 in words is "one million, four hundred thousand, three hundred forty-five".