12542402 has 8 divisors (see below), whose sum is σ = 18832716. Its totient is φ = 6264832.

The previous prime is 12542401. The next prime is 12542423. The reversal of 12542402 is 20424521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12538681 + 3721 = 3541^2 + 61^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12542401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143 + ... + 5010.

Almost surely, 2^12542402 is an apocalyptic number.

12542402 is a deficient number, since it is larger than the sum of its proper divisors (6290314).

12542402 is a wasteful number, since it uses less digits than its factorization.

12542402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6372.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 12542402 is about 3541.5253775739. The cubic root of 12542402 is about 232.3415623849.

Adding to 12542402 its reverse (20424521), we get a palindrome (32966923).

The spelling of 12542402 in words is "twelve million, five hundred forty-two thousand, four hundred two".