1421475840 has 216 divisors, whose sum is σ = 4948211268. Its totient is φ = 377487360.

The previous prime is 1421475833. The next prime is 1421475857. The reversal of 1421475840 is 485741241.

It is a happy number.

1421475840 is a `hidden beast` number, since 14 + 21 + 47 + 584 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1416167424 + 5308416 = 37632^2 + 2304^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1421475795 and 1421475804.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5898120 + ... + 5898360.

Almost surely, 2^1421475840 is an apocalyptic number.

1421475840 is a gapful number since it is divisible by the number (10) 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 1421475840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2474105634).

1421475840 is an abundant number, since it is smaller than the sum of its proper divisors (3526735428).

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

1421475840 is an frugal number, since it uses more digits than its factorization.

1421475840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 1421475840 is about 37702.4646409223. The cubic root of 1421475840 is about 1124.3801266616.

The spelling of 1421475840 in words is "one billion, four hundred twenty-one million, four hundred seventy-five thousand, eight hundred forty".