1421423402140 has 72 divisors (see below), whose sum is σ = 3474186780960. Its totient is φ = 487085171328.

The previous prime is 1421423402137. The next prime is 1421423402177. The reversal of 1421423402140 is 412043241241.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 1421423402099 and 1421423402108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1455462 + ... + 2227378.

It is an arithmetic number, because the mean of its divisors is an integer number (48252594180).

Almost surely, 2^{1421423402140} is an apocalyptic number.

1421423402140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421423402140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1737093390480).

1421423402140 is an abundant number, since it is smaller than the sum of its proper divisors (2052763378820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421423402140 is a wasteful number, since it uses less digits than its factorization.

1421423402140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773819 (or 773810 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 1421423402140 its reverse (412043241241), we get a palindrome (1833466643381).

The spelling of 1421423402140 in words is "one trillion, four hundred twenty-one billion, four hundred twenty-three million, four hundred two thousand, one hundred forty".