1023155 has 32 divisors (see below), whose sum is σ = 1548288. Its totient is φ = 633600.

The previous prime is 1023133. The next prime is 1023163. The reversal of 1023155 is 5513201.

It is not a de Polignac number, because 1023155 - 2⁸ = 1022899 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 24935 + ... + 24975.

It is an arithmetic number, because the mean of its divisors is an integer number (48384).

2^1023155 is an apocalyptic number.

1023155 is a deficient number, since it is larger than the sum of its proper divisors (525133).

1023155 is a wasteful number, since it uses less digits than its factorization.

1023155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 1023155 is about 1011.5112456122. The cubic root of 1023155 is about 100.7659515368.

Adding to 1023155 its reverse (5513201), we get a palindrome (6536356).

The spelling of 1023155 in words is "one million, twenty-three thousand, one hundred fifty-five".