12151645 has 8 divisors (see below), whose sum is σ = 15907680. Its totient is φ = 8837520.

The previous prime is 12151639. The next prime is 12151661. The reversal of 12151645 is 54615121.

It is a happy number.

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

It is not a de Polignac number, because 12151645 - 2³ = 12151637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110415 + ... + 110524.

It is an arithmetic number, because the mean of its divisors is an integer number (1988460).

Almost surely, 2^12151645 is an apocalyptic number.

It is an amenable number.

12151645 is a deficient number, since it is larger than the sum of its proper divisors (3756035).

12151645 is a wasteful number, since it uses less digits than its factorization.

12151645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220955.

The product of its digits is 1200, while the sum is 25.

The square root of 12151645 is about 3485.9209686968. The cubic root of 12151645 is about 229.9032043858.

Adding to 12151645 its reverse (54615121), we get a palindrome (66766766).

The spelling of 12151645 in words is "twelve million, one hundred fifty-one thousand, six hundred forty-five".