1401021443 has 4 divisors (see below), whose sum is σ = 1401227520. Its totient is φ = 1400815368.

The previous prime is 1401021439. The next prime is 1401021463. The reversal of 1401021443 is 3441201041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3441201041 = 149 ⋅23095309.

It is a cyclic number.

It is not a de Polignac number, because 1401021443 - 2² = 1401021439 is a prime.

It is a super-2 number, since 2×1401021443² = 3925722167491604498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1401021463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92480 + ... + 106557.

It is an arithmetic number, because the mean of its divisors is an integer number (350306880).

Almost surely, 2^1401021443 is an apocalyptic number.

1401021443 is a deficient number, since it is larger than the sum of its proper divisors (206077).

1401021443 is an equidigital number, since it uses as much as digits as its factorization.

1401021443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206076.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1401021443 is about 37430.2209851879. The cubic root of 1401021443 is about 1118.9609418913.

Adding to 1401021443 its reverse (3441201041), we get a palindrome (4842222484).

It can be divided in two parts, 14010 and 21443, that added together give a palindrome (35453).

The spelling of 1401021443 in words is "one billion, four hundred one million, twenty-one thousand, four hundred forty-three".