12142515 has 32 divisors (see below), whose sum is σ = 24224256. Its totient is φ = 5045760.

The previous prime is 12142513. The next prime is 12142517. The reversal of 12142515 is 51524121.

It is an interprime number because it is at equal distance from previous prime (12142513) and next prime (12142517).

It is not a de Polignac number, because 12142515 - 2¹ = 12142513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 12142491 and 12142500.

It is not an unprimeable number, because it can be changed into a prime (12142511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4102 + ... + 6411.

It is an arithmetic number, because the mean of its divisors is an integer number (757008).

Almost surely, 2^12142515 is an apocalyptic number.

12142515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12142515 is a deficient number, since it is larger than the sum of its proper divisors (12081741).

12142515 is a wasteful number, since it uses less digits than its factorization.

12142515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10539.

The product of its digits is 400, while the sum is 21.

The square root of 12142515 is about 3484.6111691263. The cubic root of 12142515 is about 229.8456115752.

Adding to 12142515 its reverse (51524121), we get a palindrome (63666636).

The spelling of 12142515 in words is "twelve million, one hundred forty-two thousand, five hundred fifteen".