201421140 has 24 divisors (see below), whose sum is σ = 563979360. Its totient is φ = 53712288.

The previous prime is 201421139. The next prime is 201421141. The reversal of 201421140 is 41124102.

It is an interprime number because it is at equal distance from previous prime (201421139) and next prime (201421141).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201421141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1678450 + ... + 1678569.

It is an arithmetic number, because the mean of its divisors is an integer number (23499140).

Almost surely, 2^201421140 is an apocalyptic number.

201421140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201421140 is an abundant number, since it is smaller than the sum of its proper divisors (362558220).

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

201421140 is a wasteful number, since it uses less digits than its factorization.

201421140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3357031 (or 3357029 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 201421140 is about 14192.2915697219. The cubic root of 201421140 is about 586.1854259113.

Adding to 201421140 its reverse (41124102), we get a palindrome (242545242).

The spelling of 201421140 in words is "two hundred one million, four hundred twenty-one thousand, one hundred forty".