7642155 has 8 divisors (see below), whose sum is σ = 12227472. Its totient is φ = 4075808.

The previous prime is 7642139. The next prime is 7642157. The reversal of 7642155 is 5512467.

7642155 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7642155 - 2⁴ = 7642139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7642157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254724 + ... + 254753.

It is an arithmetic number, because the mean of its divisors is an integer number (1528434).

Almost surely, 2^7642155 is an apocalyptic number.

7642155 is a deficient number, since it is larger than the sum of its proper divisors (4585317).

7642155 is a wasteful number, since it uses less digits than its factorization.

7642155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509485.

The product of its digits is 8400, while the sum is 30.

The square root of 7642155 is about 2764.4447905502. Note that the first 3 decimals coincide. The cubic root of 7642155 is about 196.9723564843.

The spelling of 7642155 in words is "seven million, six hundred forty-two thousand, one hundred fifty-five".