1401421443420 has 48 divisors (see below), whose sum is σ = 3924268578720. Its totient is φ = 373684905216.

The previous prime is 1401421443371. The next prime is 1401421443427. The reversal of 1401421443420 is 243441241041.

It is a happy number.

It is a super-2 number, since 2×1401421443420² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401421443427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29347 + ... + 1674426.

It is an arithmetic number, because the mean of its divisors is an integer number (81755595390).

Almost surely, 2^{1401421443420} is an apocalyptic number.

1401421443420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1401421443420 is an abundant number, since it is smaller than the sum of its proper divisors (2522847135300).

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

1401421443420 is a wasteful number, since it uses less digits than its factorization.

1401421443420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717494 (or 1717492 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 1401421443420 its reverse (243441241041), we get a palindrome (1644862684461).

The spelling of 1401421443420 in words is "one trillion, four hundred one billion, four hundred twenty-one million, four hundred forty-three thousand, four hundred twenty".