641554 has 8 divisors (see below), whose sum is σ = 1013040. Its totient is φ = 303876.

The previous prime is 641551. The next prime is 641579. The reversal of 641554 is 455146.

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

It is not an unprimeable number, because it can be changed into a prime (641551) 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, 8404 + ... + 8479.

It is an arithmetic number, because the mean of its divisors is an integer number (126630).

2⁶⁴¹⁵⁵⁴ is an apocalyptic number.

641554 is a deficient number, since it is larger than the sum of its proper divisors (371486).

641554 is a wasteful number, since it uses less digits than its factorization.

641554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16904.

The product of its digits is 2400, while the sum is 25.

The square root of 641554 is about 800.9706611356. The cubic root of 641554 is about 86.2470810466.

The spelling of 641554 in words is "six hundred forty-one thousand, five hundred fifty-four".