11651387 has 4 divisors (see below), whose sum is σ = 12710616. Its totient is φ = 10592160.

The previous prime is 11651371. The next prime is 11651399. The reversal of 11651387 is 78315611.

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

It is a cyclic number.

It is not a de Polignac number, because 11651387 - 2⁴ = 11651371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11651327) 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, 529598 + ... + 529619.

It is an arithmetic number, because the mean of its divisors is an integer number (3177654).

Almost surely, 2^11651387 is an apocalyptic number.

11651387 is a deficient number, since it is larger than the sum of its proper divisors (1059229).

11651387 is a wasteful number, since it uses less digits than its factorization.

11651387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059228.

The product of its digits is 5040, while the sum is 32.

The square root of 11651387 is about 3413.4128083196. The cubic root of 11651387 is about 226.7040136943.

Adding to 11651387 its reverse (78315611), we get a palindrome (89966998).

It can be divided in two parts, 1165 and 1387, that added together give a palindrome (2552).

The spelling of 11651387 in words is "eleven million, six hundred fifty-one thousand, three hundred eighty-seven".