1005140520 has 192 divisors, whose sum is σ = 3414528000. Its totient is φ = 256172544.

The previous prime is 1005140473. The next prime is 1005140561. The reversal of 1005140520 is 250415001.

1005140520 is a `hidden beast` number, since 1 + 0 + 0 + 5 + 140 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1005140493 and 1005140502.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 785241 + ... + 786519.

It is an arithmetic number, because the mean of its divisors is an integer number (17784000).

Almost surely, 2^1005140520 is an apocalyptic number.

1005140520 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 1005140520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1707264000).

1005140520 is an abundant number, since it is smaller than the sum of its proper divisors (2409387480).

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

1005140520 is a wasteful number, since it uses less digits than its factorization.

1005140520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392 (or 1385 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1005140520 is about 31703.9511733159. The cubic root of 1005140520 is about 1001.7105789180.

Adding to 1005140520 its reverse (250415001), we get a palindrome (1255555521).

The spelling of 1005140520 in words is "one billion, five million, one hundred forty thousand, five hundred twenty".