12540602 has 4 divisors (see below), whose sum is σ = 18810906. Its totient is φ = 6270300.

The previous prime is 12540601. The next prime is 12540607. The reversal of 12540602 is 20604521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20604521 = 7 ⋅2943503.

It can be written as a sum of positive squares in only one way, i.e., 11215801 + 1324801 = 3349^2 + 1151^2 .

It is not an unprimeable number, because it can be changed into a prime (12540601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3135149 + ... + 3135152.

Almost surely, 2^12540602 is an apocalyptic number.

12540602 is a deficient number, since it is larger than the sum of its proper divisors (6270304).

12540602 is an equidigital number, since it uses as much as digits as its factorization.

12540602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6270303.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 12540602 is about 3541.2712406705. The cubic root of 12540602 is about 232.3304471609.

The spelling of 12540602 in words is "twelve million, five hundred forty thousand, six hundred two".