103512421 has 8 divisors (see below), whose sum is σ = 106437240. Its totient is φ = 100594368.

The previous prime is 103512419. The next prime is 103512427. The reversal of 103512421 is 124215301.

It can be written as a sum of positive squares in 4 ways, for example, as 2208196 + 101304225 = 1486^2 + 10065^2 .

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 103512421 - 2¹ = 103512419 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 (103512427) 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, 59715 + ... + 61423.

It is an arithmetic number, because the mean of its divisors is an integer number (13304655).

Almost surely, 2^103512421 is an apocalyptic number.

It is an amenable number.

103512421 is a deficient number, since it is larger than the sum of its proper divisors (2924819).

103512421 is a wasteful number, since it uses less digits than its factorization.

103512421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3383.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 103512421 is about 10174.1054152196. The cubic root of 103512421 is about 469.5308748947.

Adding to 103512421 its reverse (124215301), we get a palindrome (227727722).

It can be divided in two parts, 1035 and 12421, that added together give a square (13456 = 116²).

The spelling of 103512421 in words is "one hundred three million, five hundred twelve thousand, four hundred twenty-one".