103452721 has 2 divisors, whose sum is σ = 103452722. Its totient is φ = 103452720.

The previous prime is 103452719. The next prime is 103452761. The reversal of 103452721 is 127254301.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62236321 + 41216400 = 7889^2 + 6420^2 .

It is an emirp because it is prime and its reverse (127254301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 103452721 - 2¹ = 103452719 is a prime.

Together with 103452719, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (103452761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51726360 + 51726361.

It is an arithmetic number, because the mean of its divisors is an integer number (51726361).

Almost surely, 2^103452721 is an apocalyptic number.

It is an amenable number.

103452721 is a deficient number, since it is larger than the sum of its proper divisors (1).

103452721 is an equidigital number, since it uses as much as digits as its factorization.

103452721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 103452721 is about 10171.1710731852. The cubic root of 103452721 is about 469.4405914177.

The spelling of 103452721 in words is "one hundred three million, four hundred fifty-two thousand, seven hundred twenty-one".