103440421 has 6 divisors (see below), whose sum is σ = 120328710. Its totient is φ = 88663176.

The previous prime is 103440409. The next prime is 103440433. The reversal of 103440421 is 124044301.

It is an interprime number because it is at equal distance from previous prime (103440409) and next prime (103440433).

It can be written as a sum of positive squares in only one way, i.e., 94672900 + 8767521 = 9730^2 + 2961^2 .

It is not a de Polignac number, because 103440421 - 2¹¹ = 103438373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103440451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1055466 + ... + 1055563.

It is an arithmetic number, because the mean of its divisors is an integer number (20054785).

Almost surely, 2^103440421 is an apocalyptic number.

It is an amenable number.

103440421 is a deficient number, since it is larger than the sum of its proper divisors (16888289).

103440421 is an equidigital number, since it uses as much as digits as its factorization.

103440421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111043 (or 2111036 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 103440421 is about 10170.5664050730. The cubic root of 103440421 is about 469.4219859844.

Adding to 103440421 its reverse (124044301), we get a palindrome (227484722).

The spelling of 103440421 in words is "one hundred three million, four hundred forty thousand, four hundred twenty-one".