1421551040 has 112 divisors (see below), whose sum is σ = 4166323392. Its totient is φ = 449888256.

The previous prime is 1421551037. The next prime is 1421551069. The reversal of 1421551040 is 401551241.

It is a tau number, because it is divible by the number of its divisors (112).

It is a junction number, because it is equal to n+sod(n) for n = 1421550997 and 1421551015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4712 + ... + 53528.

It is an arithmetic number, because the mean of its divisors is an integer number (37199316).

Almost surely, 2^1421551040 is an apocalyptic number.

1421551040 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 1421551040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2083161696).

1421551040 is an abundant number, since it is smaller than the sum of its proper divisors (2744772352).

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

1421551040 is a wasteful number, since it uses less digits than its factorization.

1421551040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48854 (or 48844 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1421551040 is about 37703.4619100156. The cubic root of 1421551040 is about 1124.3999539172.

The spelling of 1421551040 in words is "one billion, four hundred twenty-one million, five hundred fifty-one thousand, forty".