275142420 has 240 divisors, whose sum is σ = 1039167360. Its totient is φ = 59533056.

The previous prime is 275142409. The next prime is 275142437. The reversal of 275142420 is 24241572.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 214822 + ... + 216098.

It is an arithmetic number, because the mean of its divisors is an integer number (4329864).

Almost surely, 2^275142420 is an apocalyptic number.

275142420 is a gapful number since it is divisible by the number (20) 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 275142420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (519583680).

275142420 is an abundant number, since it is smaller than the sum of its proper divisors (764024940).

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

275142420 is a wasteful number, since it uses less digits than its factorization.

275142420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324 (or 1313 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 275142420 is about 16587.4175205184. The cubic root of 275142420 is about 650.4079647995.

Adding to 275142420 its reverse (24241572), we get a palindrome (299383992).

The spelling of 275142420 in words is "two hundred seventy-five million, one hundred forty-two thousand, four hundred twenty".