641242500 has 120 divisors (see below), whose sum is σ = 1883622048. Its totient is φ = 169728000.

The previous prime is 641242487. The next prime is 641242541. The reversal of 641242500 is 5242146.

It is a super-2 number, since 2×641242500² = 822383887612500000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1447279 + ... + 1447721.

Almost surely, 2^641242500 is an apocalyptic number.

641242500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641242500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (941811024).

641242500 is an abundant number, since it is smaller than the sum of its proper divisors (1242379548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641242500 is a wasteful number, since it uses less digits than its factorization.

641242500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 641242500 is about 25322.7664365488. The cubic root of 641242500 is about 862.3311999005.

Adding to 641242500 its reverse (5242146), we get a palindrome (646484646).

The spelling of 641242500 in words is "six hundred forty-one million, two hundred forty-two thousand, five hundred".