10121540 has 48 divisors (see below), whose sum is σ = 24978240. Its totient is φ = 3396480.

The previous prime is 10121539. The next prime is 10121543. The reversal of 10121540 is 4512101.

It is not an unprimeable number, because it can be changed into a prime (10121543) 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, 1091 + ... + 4629.

It is an arithmetic number, because the mean of its divisors is an integer number (520380).

Almost surely, 2^10121540 is an apocalyptic number.

10121540 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 10121540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12489120).

10121540 is an abundant number, since it is smaller than the sum of its proper divisors (14856700).

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

10121540 is a wasteful number, since it uses less digits than its factorization.

10121540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3572 (or 3570 counting only the distinct ones).

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

The square root of 10121540 is about 3181.4367823359. The cubic root of 10121540 is about 216.3127898570.

Adding to 10121540 its reverse (4512101), we get a palindrome (14633641).

It can be divided in two parts, 1012 and 1540, that added together give a palindrome (2552).

The spelling of 10121540 in words is "ten million, one hundred twenty-one thousand, five hundred forty".