1002105420 has 48 divisors (see below), whose sum is σ = 2813771520. Its totient is φ = 266478016.

The previous prime is 1002105407. The next prime is 1002105421. The reversal of 1002105420 is 245012001.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1002105420.

It is not an unprimeable number, because it can be changed into a prime (1002105421) 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, 1722 + ... + 44801.

It is an arithmetic number, because the mean of its divisors is an integer number (58620240).

Almost surely, 2^1002105420 is an apocalyptic number.

1002105420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002105420 is an abundant number, since it is smaller than the sum of its proper divisors (1811666100).

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

1002105420 is a wasteful number, since it uses less digits than its factorization.

1002105420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46894 (or 46892 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1002105420 is about 31656.0487111073. The cubic root of 1002105420 is about 1000.7013147094.

Adding to 1002105420 its reverse (245012001), we get a palindrome (1247117421).

The spelling of 1002105420 in words is "one billion, two million, one hundred five thousand, four hundred twenty".