2978261 has 16 divisors (see below), whose sum is σ = 3568320. Its totient is φ = 2449920.

The previous prime is 2978251. The next prime is 2978267. The reversal of 2978261 is 1628792.

It is a happy number.

It is not a de Polignac number, because 2978261 - 2⁶ = 2978197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978267) 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 15 ways as a sum of consecutive naturals, for example, 8261 + ... + 8613.

It is an arithmetic number, because the mean of its divisors is an integer number (223020).

2^2978261 is an apocalyptic number.

It is an amenable number.

2978261 is a deficient number, since it is larger than the sum of its proper divisors (590059).

2978261 is a wasteful number, since it uses less digits than its factorization.

2978261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436.

The product of its digits is 12096, while the sum is 35.

The square root of 2978261 is about 1725.7638888330. The cubic root of 2978261 is about 143.8757447935.

It can be divided in two parts, 297 and 8261, that added together give a palindrome (8558).

The spelling of 2978261 in words is "two million, nine hundred seventy-eight thousand, two hundred sixty-one".