1009155 has 24 divisors (see below), whose sum is σ = 1879632. Its totient is φ = 460992.

The previous prime is 1009153. The next prime is 1009157. The reversal of 1009155 is 5519001.

It is a happy number.

1009155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1009153) and next prime (1009157).

It is not a de Polignac number, because 1009155 - 2¹ = 1009153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1009153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49 + ... + 1421.

It is an arithmetic number, because the mean of its divisors is an integer number (78318).

2^1009155 is an apocalyptic number.

1009155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1009155 is a deficient number, since it is larger than the sum of its proper divisors (870477).

1009155 is a wasteful number, since it uses less digits than its factorization.

1009155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395 (or 1388 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 21.

The square root of 1009155 is about 1004.5670709316. The cubic root of 1009155 is about 100.3042401075.

The spelling of 1009155 in words is "one million, nine thousand, one hundred fifty-five".