12301540 has 48 divisors (see below), whose sum is σ = 27708912. Its totient is φ = 4571136.

The previous prime is 12301537. The next prime is 12301543. The reversal of 12301540 is 4510321.

It is an interprime number because it is at equal distance from previous prime (12301537) and next prime (12301543).

It can be written as a sum of positive squares in 8 ways, for example, as 65536 + 12236004 = 256^2 + 3498^2 .

It is not an unprimeable number, because it can be changed into a prime (12301543) 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, 32794 + ... + 33166.

It is an arithmetic number, because the mean of its divisors is an integer number (577269).

Almost surely, 2^12301540 is an apocalyptic number.

12301540 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 12301540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13854456).

12301540 is an abundant number, since it is smaller than the sum of its proper divisors (15407372).

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

12301540 is a wasteful number, since it uses less digits than its factorization.

12301540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 12301540 is about 3507.3551288685. The cubic root of 12301540 is about 230.8446573386.

Adding to 12301540 its reverse (4510321), we get a palindrome (16811861).

The spelling of 12301540 in words is "twelve million, three hundred one thousand, five hundred forty".