11251978 has 8 divisors (see below), whose sum is σ = 17081568. Its totient is φ = 5558124.

The previous prime is 11251973. The next prime is 11251979. The reversal of 11251978 is 87915211.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (11251973) 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 3 ways as a sum of consecutive naturals, for example, 33726 + ... + 34057.

It is an arithmetic number, because the mean of its divisors is an integer number (2135196).

Almost surely, 2^11251978 is an apocalyptic number.

11251978 is a deficient number, since it is larger than the sum of its proper divisors (5829590).

11251978 is an equidigital number, since it uses as much as digits as its factorization.

11251978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67868.

The product of its digits is 5040, while the sum is 34.

The square root of 11251978 is about 3354.3968161206. The cubic root of 11251978 is about 224.0833687340.

The spelling of 11251978 in words is "eleven million, two hundred fifty-one thousand, nine hundred seventy-eight".