649154 has 16 divisors (see below), whose sum is σ = 1118880. Its totient is φ = 279360.

The previous prime is 649151. The next prime is 649157. The reversal of 649154 is 451946.

It is an interprime number because it is at equal distance from previous prime (649151) and next prime (649157).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (649151) 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 in 7 ways as a sum of consecutive naturals, for example, 359 + ... + 1194.

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

2⁶⁴⁹¹⁵⁴ is an apocalyptic number.

649154 is a deficient number, since it is larger than the sum of its proper divisors (469726).

649154 is a wasteful number, since it uses less digits than its factorization.

649154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585.

The product of its digits is 4320, while the sum is 29.

The square root of 649154 is about 805.7009370728. The cubic root of 649154 is about 86.5863127673.

The spelling of 649154 in words is "six hundred forty-nine thousand, one hundred fifty-four".