8402155 has 4 divisors (see below), whose sum is σ = 10082592. Its totient is φ = 6721720.

The previous prime is 8402111. The next prime is 8402159. The reversal of 8402155 is 5512048.

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

It is not a de Polignac number, because 8402155 - 2⁷ = 8402027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8402159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840211 + ... + 840220.

It is an arithmetic number, because the mean of its divisors is an integer number (2520648).

Almost surely, 2^8402155 is an apocalyptic number.

8402155 is a deficient number, since it is larger than the sum of its proper divisors (1680437).

8402155 is a wasteful number, since it uses less digits than its factorization.

8402155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680436.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 8402155 is about 2898.6470982167. The cubic root of 8402155 is about 203.2966534810.

The spelling of 8402155 in words is "eight million, four hundred two thousand, one hundred fifty-five".