12002542 has 4 divisors (see below), whose sum is σ = 18003816. Its totient is φ = 6001270.

The previous prime is 12002519. The next prime is 12002579. The reversal of 12002542 is 24520021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24520021 = 431 ⋅56891.

It is a super-2 number, since 2×12002542² = 288122028923528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3000634 + ... + 3000637.

It is an arithmetic number, because the mean of its divisors is an integer number (4500954).

Almost surely, 2^12002542 is an apocalyptic number.

12002542 is a deficient number, since it is larger than the sum of its proper divisors (6001274).

12002542 is an equidigital number, since it uses as much as digits as its factorization.

12002542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6001273.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 12002542 is about 3464.4685018051. The cubic root of 12002542 is about 228.9590132782.

Adding to 12002542 its reverse (24520021), we get a palindrome (36522563).

It can be divided in two parts, 12002 and 542, that added together give a square (12544 = 112²).

The spelling of 12002542 in words is "twelve million, two thousand, five hundred forty-two".