2158004 has 6 divisors (see below), whose sum is σ = 3776514. Its totient is φ = 1079000.

The previous prime is 2157989. The next prime is 2158019. The reversal of 2158004 is 4008512.

2158004 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 (2157989) and next prime (2158019).

It can be written as a sum of positive squares in only one way, i.e., 1795600 + 362404 = 1340^2 + 602^2 .

It is an Ulam number.

It is a pancake number, because a pancake can be divided into 2158004 parts by 2077 straight cuts.

It is a congruent number.

It is an unprimeable number.

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, 269747 + ... + 269754.

It is an arithmetic number, because the mean of its divisors is an integer number (629419).

2^2158004 is an apocalyptic number.

It is an amenable number.

2158004 is a deficient number, since it is larger than the sum of its proper divisors (1618510).

2158004 is a wasteful number, since it uses less digits than its factorization.

2158004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539505 (or 539503 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2158004 is about 1469.0146357338. The cubic root of 2158004 is about 129.2262519861.

The spelling of 2158004 in words is "two million, one hundred fifty-eight thousand, four".