1001552420 has 48 divisors (see below), whose sum is σ = 2296728000. Its totient is φ = 363841920.

The previous prime is 1001552413. The next prime is 1001552423. The reversal of 1001552420 is 242551001.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1001552392 and 1001552401.

It is not an unprimeable number, because it can be changed into a prime (1001552423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339311 + ... + 342249.

It is an arithmetic number, because the mean of its divisors is an integer number (47848500).

Almost surely, 2^1001552420 is an apocalyptic number.

1001552420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001552420 is an abundant number, since it is smaller than the sum of its proper divisors (1295175580).

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

1001552420 is a wasteful number, since it uses less digits than its factorization.

1001552420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4508 (or 4506 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1001552420 is about 31647.3129981046. The cubic root of 1001552420 is about 1000.5172057854.

The spelling of 1001552420 in words is "one billion, one million, five hundred fifty-two thousand, four hundred twenty".