1000421500 has 48 divisors (see below), whose sum is σ = 2353006656. Its totient is φ = 369384000.

The previous prime is 1000421489. The next prime is 1000421561. The reversal of 1000421500 is 51240001.

It is a Harshad number since it is a multiple of its sum of digits (13).

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, 70456 + ... + 83455.

It is an arithmetic number, because the mean of its divisors is an integer number (49020972).

Almost surely, 2^1000421500 is an apocalyptic number.

1000421500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000421500 is an abundant number, since it is smaller than the sum of its proper divisors (1352585156).

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

1000421500 is a wasteful number, since it uses less digits than its factorization.

1000421500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153943 (or 153931 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 1000421500 is about 31629.4403997289. The cubic root of 1000421500 is about 1000.1404802644.

Adding to 1000421500 its reverse (51240001), we get a palindrome (1051661501).

It can be divided in two parts, 1000 and 421500, that added together give a square (422500 = 650²).

The spelling of 1000421500 in words is "one billion, four hundred twenty-one thousand, five hundred".