641247902 has 8 divisors (see below), whose sum is σ = 962280000. Its totient is φ = 320487904.

The previous prime is 641247899. The next prime is 641247907. The reversal of 641247902 is 209742146.

641247902 is digitally balanced in base 2, 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 super-2 number, since 2×641247902² = 822397743638803208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641247907) 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, 62027 + ... + 71622.

It is an arithmetic number, because the mean of its divisors is an integer number (120285000).

Almost surely, 2^641247902 is an apocalyptic number.

641247902 is a deficient number, since it is larger than the sum of its proper divisors (321032098).

641247902 is a wasteful number, since it uses less digits than its factorization.

641247902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136050.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 641247902 is about 25322.8730992358. The cubic root of 641247902 is about 862.3336213973. Note that the first 3 decimals are identical.

The spelling of 641247902 in words is "six hundred forty-one million, two hundred forty-seven thousand, nine hundred two".