1400443021 has 8 divisors (see below), whose sum is σ = 1463295744. Its totient is φ = 1337754000.

The previous prime is 1400443019. The next prime is 1400443111. The reversal of 1400443021 is 1203440041.

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 1400443021 - 2¹ = 1400443019 is a prime.

It is a super-2 number, since 2×1400443021² = 3922481310135212882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1400443021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400447021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23266 + ... + 57811.

It is an arithmetic number, because the mean of its divisors is an integer number (182911968).

Almost surely, 2^1400443021 is an apocalyptic number.

It is an amenable number.

1400443021 is a deficient number, since it is larger than the sum of its proper divisors (62852723).

1400443021 is an equidigital number, since it uses as much as digits as its factorization.

1400443021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81851.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1400443021 is about 37422.4935166004. The cubic root of 1400443021 is about 1118.8069302781.

Adding to 1400443021 its reverse (1203440041), we get a palindrome (2603883062).

The spelling of 1400443021 in words is "one billion, four hundred million, four hundred forty-three thousand, twenty-one".