5149981 has 8 divisors (see below), whose sum is σ = 5302880. Its totient is φ = 4998672.

The previous prime is 5149979. The next prime is 5149987. The reversal of 5149981 is 1899415.

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 5149981 - 2¹ = 5149979 is a prime.

It is a super-2 number, since 2×5149981² = 53044608600722, which contains 22 as substring.

It is a Duffinian number.

5149981 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 5149981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5149987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9586 + ... + 10108.

It is an arithmetic number, because the mean of its divisors is an integer number (662860).

Almost surely, 2^5149981 is an apocalyptic number.

It is an amenable number.

5149981 is a deficient number, since it is larger than the sum of its proper divisors (152899).

5149981 is a wasteful number, since it uses less digits than its factorization.

5149981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795.

The product of its digits is 12960, while the sum is 37.

The square root of 5149981 is about 2269.3569573780. The cubic root of 5149981 is about 172.6905379027.

The spelling of 5149981 in words is "five million, one hundred forty-nine thousand, nine hundred eighty-one".