2607981 has 8 divisors (see below), whose sum is σ = 3487104. Its totient is φ = 1733760.

The previous prime is 2607973. The next prime is 2607989. The reversal of 2607981 is 1897062.

It is an interprime number because it is at equal distance from previous prime (2607973) and next prime (2607989).

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

It is not a de Polignac number, because 2607981 - 2³ = 2607973 is a prime.

It is a super-2 number, since 2×2607981² = 13603129792722, which contains 22 as substring.

It is an Ulam number.

2607981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2607989) 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, 285 + ... + 2301.

It is an arithmetic number, because the mean of its divisors is an integer number (435888).

2^2607981 is an apocalyptic number.

It is an amenable number.

2607981 is a deficient number, since it is larger than the sum of its proper divisors (879123).

2607981 is a wasteful number, since it uses less digits than its factorization.

2607981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 2607981 is about 1614.9244564375. The cubic root of 2607981 is about 137.6474407414.

The spelling of 2607981 in words is "two million, six hundred seven thousand, nine hundred eighty-one".