12545378 has 4 divisors (see below), whose sum is σ = 18818070. Its totient is φ = 6272688.

The previous prime is 12545369. The next prime is 12545387. The reversal of 12545378 is 87354521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12545369) and next prime (12545387).

It can be written as a sum of positive squares in only one way, i.e., 11648569 + 896809 = 3413^2 + 947^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3136343 + ... + 3136346.

Almost surely, 2^12545378 is an apocalyptic number.

12545378 is a deficient number, since it is larger than the sum of its proper divisors (6272692).

12545378 is an equidigital number, since it uses as much as digits as its factorization.

12545378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6272691.

The product of its digits is 33600, while the sum is 35.

The square root of 12545378 is about 3541.9455105916. The cubic root of 12545378 is about 232.3599372227.

Adding to 12545378 its reverse (87354521), we get a palindrome (99899899).

The spelling of 12545378 in words is "twelve million, five hundred forty-five thousand, three hundred seventy-eight".