12551001 has 16 divisors (see below), whose sum is σ = 18186240. Its totient is φ = 7670160.

The previous prime is 12550991. The next prime is 12551003. The reversal of 12551001 is 10015521.

It is not a de Polignac number, because 12551001 - 2⁷ = 12550873 is a prime.

It is a super-2 number, since 2×12551001² = 315055252204002, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12551003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1785 + ... + 5318.

It is an arithmetic number, because the mean of its divisors is an integer number (1136640).

Almost surely, 2^12551001 is an apocalyptic number.

It is an amenable number.

12551001 is a deficient number, since it is larger than the sum of its proper divisors (5635239).

12551001 is a wasteful number, since it uses less digits than its factorization.

12551001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7156.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 12551001 is about 3542.7391944652. The cubic root of 12551001 is about 232.3946476095.

Adding to 12551001 its reverse (10015521), we get a palindrome (22566522).

The spelling of 12551001 in words is "twelve million, five hundred fifty-one thousand, one".