102721961 has 8 divisors (see below), whose sum is σ = 108585600. Its totient is φ = 96904080.

The previous prime is 102721951. The next prime is 102721963. The reversal of 102721961 is 169127201.

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

It is a cyclic number.

It is not a de Polignac number, because 102721961 - 2²² = 98527657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102721963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6770 + ... + 15851.

It is an arithmetic number, because the mean of its divisors is an integer number (13573200).

Almost surely, 2^102721961 is an apocalyptic number.

It is an amenable number.

102721961 is a deficient number, since it is larger than the sum of its proper divisors (5863639).

102721961 is a wasteful number, since it uses less digits than its factorization.

102721961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22879.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 102721961 is about 10135.1843101149. The cubic root of 102721961 is about 468.3326478744.

The spelling of 102721961 in words is "one hundred two million, seven hundred twenty-one thousand, nine hundred sixty-one".