421276240 has 80 divisors (see below), whose sum is σ = 1221171840. Its totient is φ = 131304960.

The previous prime is 421276223. The next prime is 421276241. The reversal of 421276240 is 42672124.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 421276199 and 421276208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421276241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28035 + ... + 40354.

It is an arithmetic number, because the mean of its divisors is an integer number (15264648).

Almost surely, 2^421276240 is an apocalyptic number.

421276240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421276240 is an abundant number, since it is smaller than the sum of its proper divisors (799895600).

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

421276240 is a wasteful number, since it uses less digits than its factorization.

421276240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68420 (or 68414 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 421276240 is about 20525.0149817241. The cubic root of 421276240 is about 749.6450112631.

The spelling of 421276240 in words is "four hundred twenty-one million, two hundred seventy-six thousand, two hundred forty".