140421400 has 96 divisors (see below), whose sum is σ = 392832000. Its totient is φ = 45601920.

The previous prime is 140421397. The next prime is 140421409. The reversal of 140421400 is 4124041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140421409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23961 + ... + 29239.

It is an arithmetic number, because the mean of its divisors is an integer number (4092000).

Almost surely, 2^140421400 is an apocalyptic number.

140421400 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 140421400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196416000).

140421400 is an abundant number, since it is smaller than the sum of its proper divisors (252410600).

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

140421400 is a wasteful number, since it uses less digits than its factorization.

140421400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5321 (or 5312 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 140421400 is about 11849.9535864070. The cubic root of 140421400 is about 519.7698685822.

Adding to 140421400 its reverse (4124041), we get a palindrome (144545441).

The spelling of 140421400 in words is "one hundred forty million, four hundred twenty-one thousand, four hundred".