281421036 has 72 divisors (see below), whose sum is σ = 768731600. Its totient is φ = 86292864.

The previous prime is 281421013. The next prime is 281421037. The reversal of 281421036 is 630124182.

It is not an unprimeable number, because it can be changed into a prime (281421037) 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, 162471 + ... + 164193.

Almost surely, 2^281421036 is an apocalyptic number.

281421036 is a gapful number since it is divisible by the number (26) 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 281421036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (384365800).

281421036 is an abundant number, since it is smaller than the sum of its proper divisors (487310564).

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

281421036 is a wasteful number, since it uses less digits than its factorization.

281421036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2095 (or 2090 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 281421036 is about 16775.6083645274. The cubic root of 281421036 is about 655.3181338243.

The spelling of 281421036 in words is "two hundred eighty-one million, four hundred twenty-one thousand, thirty-six".