3129955 has 16 divisors (see below), whose sum is σ = 4152384. Its totient is φ = 2252800.

The previous prime is 3129953. The next prime is 3129961. The reversal of 3129955 is 5599213.

It is a happy number.

It is not a de Polignac number, because 3129955 - 2¹ = 3129953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3129955.

It is not an unprimeable number, because it can be changed into a prime (3129953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1155 + ... + 2755.

It is an arithmetic number, because the mean of its divisors is an integer number (259524).

Almost surely, 2^3129955 is an apocalyptic number.

3129955 is a deficient number, since it is larger than the sum of its proper divisors (1022429).

3129955 is a wasteful number, since it uses less digits than its factorization.

3129955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646.

The product of its digits is 12150, while the sum is 34.

The square root of 3129955 is about 1769.1678834978. The cubic root of 3129955 is about 146.2781181478.

The spelling of 3129955 in words is "three million, one hundred twenty-nine thousand, nine hundred fifty-five".