649155 has 16 divisors (see below), whose sum is σ = 1118880. Its totient is φ = 319488.

The previous prime is 649151. The next prime is 649157. The reversal of 649155 is 551946.

It is not a de Polignac number, because 649155 - 2² = 649151 is a prime.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (649151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1470 + ... + 1859.

It is an arithmetic number, because the mean of its divisors is an integer number (69930).

2⁶⁴⁹¹⁵⁵ is an apocalyptic number.

649155 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

649155 is a deficient number, since it is larger than the sum of its proper divisors (469725).

649155 is a wasteful number, since it uses less digits than its factorization.

649155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3350.

The product of its digits is 5400, while the sum is 30.

The square root of 649155 is about 805.7015576502. The cubic root of 649155 is about 86.5863572284.

The spelling of 649155 in words is "six hundred forty-nine thousand, one hundred fifty-five".