103442621 has 2 divisors, whose sum is σ = 103442622. Its totient is φ = 103442620.

The previous prime is 103442611. The next prime is 103442659. The reversal of 103442621 is 126244301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60684100 + 42758521 = 7790^2 + 6539^2 .

It is an emirp because it is prime and its reverse (126244301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 103442621 - 2¹⁴ = 103426237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103442611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51721310 + 51721311.

It is an arithmetic number, because the mean of its divisors is an integer number (51721311).

Almost surely, 2^103442621 is an apocalyptic number.

It is an amenable number.

103442621 is a deficient number, since it is larger than the sum of its proper divisors (1).

103442621 is an equidigital number, since it uses as much as digits as its factorization.

103442621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 103442621 is about 10170.6745597330. The cubic root of 103442621 is about 469.4253138937.

Adding to 103442621 its reverse (126244301), we get a palindrome (229686922).

The spelling of 103442621 in words is "one hundred three million, four hundred forty-two thousand, six hundred twenty-one".