12157511 has 8 divisors (see below), whose sum is σ = 13039920. Its totient is φ = 11299392.

The previous prime is 12157469. The next prime is 12157553. The reversal of 12157511 is 11575121.

It is an interprime number because it is at equal distance from previous prime (12157469) and next prime (12157553).

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

It is a cyclic number.

It is not a de Polignac number, because 12157511 - 2¹⁴ = 12141127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12157711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5030 + ... + 7043.

It is an arithmetic number, because the mean of its divisors is an integer number (1629990).

Almost surely, 2^12157511 is an apocalyptic number.

12157511 is a deficient number, since it is larger than the sum of its proper divisors (882409).

12157511 is a wasteful number, since it uses less digits than its factorization.

12157511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12145.

The product of its digits is 350, while the sum is 23.

The square root of 12157511 is about 3486.7622517172. The cubic root of 12157511 is about 229.9401923889.

It can be divided in two parts, 1 and 2157511, that added together give a palindrome (2157512).

The spelling of 12157511 in words is "twelve million, one hundred fifty-seven thousand, five hundred eleven".