2955781 has 2 divisors, whose sum is σ = 2955782. Its totient is φ = 2955780.

The previous prime is 2955761. The next prime is 2955803. The reversal of 2955781 is 1875592.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2512225 + 443556 = 1585^2 + 666^2 .

It is a cyclic number.

It is not a de Polignac number, because 2955781 - 2⁵ = 2955749 is a prime.

It is a super-2 number, since 2×2955781² = 17473282639922, which contains 22 as substring.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 2955781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2955721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1477890 + 1477891.

It is an arithmetic number, because the mean of its divisors is an integer number (1477891).

2^2955781 is an apocalyptic number.

It is an amenable number.

2955781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2955781 is an equidigital number, since it uses as much as digits as its factorization.

2955781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 37.

The square root of 2955781 is about 1719.2384942177. The cubic root of 2955781 is about 143.5128374194.

The spelling of 2955781 in words is "two million, nine hundred fifty-five thousand, seven hundred eighty-one".