1400310021 has 16 divisors (see below), whose sum is σ = 2102519808. Its totient is φ = 821295600.

The previous prime is 1400309987. The next prime is 1400310049. The reversal of 1400310021 is 1200130041.

It is a happy number.

It is not a de Polignac number, because 1400310021 - 2⁷ = 1400309893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1400309979 and 1400310006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400310421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 683391 + ... + 685436.

It is an arithmetic number, because the mean of its divisors is an integer number (131407488).

Almost surely, 2^1400310021 is an apocalyptic number.

1400310021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1400310021 is a deficient number, since it is larger than the sum of its proper divisors (702209787).

1400310021 is a wasteful number, since it uses less digits than its factorization.

1400310021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368872.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1400310021 is about 37420.7164682880. The cubic root of 1400310021 is about 1118.7715114784.

Adding to 1400310021 its reverse (1200130041), we get a palindrome (2600440062).

The spelling of 1400310021 in words is "one billion, four hundred million, three hundred ten thousand, twenty-one".