1001151 has 12 divisors (see below), whose sum is σ = 1456728. Its totient is φ = 662544.

The previous prime is 1001123. The next prime is 1001153. The reversal of 1001151 is 1511001.

It is not a de Polignac number, because 1001151 - 2⁶ = 1001087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1236 + ... + 1878.

It is an arithmetic number, because the mean of its divisors is an integer number (121394).

2^1001151 is an apocalyptic number.

1001151 is a deficient number, since it is larger than the sum of its proper divisors (455577).

1001151 is a wasteful number, since it uses less digits than its factorization.

1001151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822 (or 819 counting only the distinct ones).

The product of its (nonzero) digits is 5, while the sum is 9.

The square root of 1001151 is about 1000.5753344951. The cubic root of 1001151 is about 100.0383519561.

Adding to 1001151 its reverse (1511001), we get a palindrome (2512152).

It can be divided in two parts, 1001 and 151, that multiplied together give a palindrome (151151).

The spelling of 1001151 in words is "one million, one thousand, one hundred fifty-one".