1002154 has 4 divisors (see below), whose sum is σ = 1503234. Its totient is φ = 501076.

The previous prime is 1002151. The next prime is 1002173. The reversal of 1002154 is 4512001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 950625 + 51529 = 975^2 + 227^2 .

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250537 + ... + 250540.

2^1002154 is an apocalyptic number.

1002154 is a deficient number, since it is larger than the sum of its proper divisors (501080).

1002154 is an equidigital number, since it uses as much as digits as its factorization.

1002154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501079.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 1002154 is about 1001.0764206593. The cubic root of 1002154 is about 100.0717485092.

Adding to 1002154 its reverse (4512001), we get a palindrome (5514155).

It can be divided in two parts, 1002 and 154, that added together give a square (1156 = 34²).

The spelling of 1002154 in words is "one million, two thousand, one hundred fifty-four".