1001212520 has 192 divisors, whose sum is σ = 2894279040. Its totient is φ = 302745600.

The previous prime is 1001212519. The next prime is 1001212529. The reversal of 1001212520 is 252121001.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 1001212495 and 1001212504.

It is not an unprimeable number, because it can be changed into a prime (1001212529) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13715204 + ... + 13715276.

It is an arithmetic number, because the mean of its divisors is an integer number (15074370).

Almost surely, 2^1001212520 is an apocalyptic number.

1001212520 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 1001212520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1447139520).

1001212520 is an abundant number, since it is smaller than the sum of its proper divisors (1893066520).

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

1001212520 is a wasteful number, since it uses less digits than its factorization.

1001212520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 1001212520 is about 31641.9424182524. The cubic root of 1001212520 is about 1000.4040100872.

Adding to 1001212520 its reverse (252121001), we get a palindrome (1253333521).

The spelling of 1001212520 in words is "one billion, one million, two hundred twelve thousand, five hundred twenty".