1002155 has 32 divisors (see below), whose sum is σ = 1589760. Its totient is φ = 587520.

The previous prime is 1002151. The next prime is 1002173. The reversal of 1002155 is 5512001.

It is not a de Polignac number, because 1002155 - 2² = 1002151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1002151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7247 + ... + 7383.

It is an arithmetic number, because the mean of its divisors is an integer number (49680).

2^1002155 is an apocalyptic number.

1002155 is a deficient number, since it is larger than the sum of its proper divisors (587605).

1002155 is a wasteful number, since it uses less digits than its factorization.

1002155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 1002155 is about 1001.0769201215. The cubic root of 1002155 is about 100.0717817947.

Adding to 1002155 its reverse (5512001), we get a palindrome (6514156).

It can be divided in two parts, 10021 and 55, that multiplied together give a palindrome (551155).

The spelling of 1002155 in words is "one million, two thousand, one hundred fifty-five".