140421204 has 144 divisors (see below), whose sum is σ = 446584320. Its totient is φ = 36141120.

The previous prime is 140421199. The next prime is 140421217. The reversal of 140421204 is 402124041.

140421204 is a `hidden beast` number, since 1 + 40 + 421 + 204 = 666.

It is a super-2 number, since 2×140421204² = 39436229065619232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 496047 + ... + 496329.

It is an arithmetic number, because the mean of its divisors is an integer number (3101280).

Almost surely, 2^140421204 is an apocalyptic number.

140421204 is a gapful number since it is divisible by the number (14) 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 140421204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223292160).

140421204 is an abundant number, since it is smaller than the sum of its proper divisors (306163116).

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

140421204 is a wasteful number, since it uses less digits than its factorization.

140421204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 140421204 is about 11849.9453163295. The cubic root of 140421204 is about 519.7696267507.

Adding to 140421204 its reverse (402124041), we get a palindrome (542545245).

It can be divided in two parts, 140421 and 204, that added together give a square (140625 = 375²).

The spelling of 140421204 in words is "one hundred forty million, four hundred twenty-one thousand, two hundred four".