103142421 has 12 divisors (see below), whose sum is σ = 153010572. Its totient is φ = 66902976.

The previous prime is 103142387. The next prime is 103142447. The reversal of 103142421 is 124241301.

103142421 is a `hidden beast` number, since 103 + 142 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 42068196 + 61074225 = 6486^2 + 7815^2 .

It is not a de Polignac number, because 103142421 - 2²⁵ = 69587989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 103142394 and 103142403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103142471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154536 + ... + 155201.

It is an arithmetic number, because the mean of its divisors is an integer number (12750881).

Almost surely, 2^103142421 is an apocalyptic number.

It is an amenable number.

103142421 is a deficient number, since it is larger than the sum of its proper divisors (49868151).

103142421 is a wasteful number, since it uses less digits than its factorization.

103142421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309780 (or 309777 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 103142421 is about 10155.9057203186. The cubic root of 103142421 is about 468.9707687541.

Adding to 103142421 its reverse (124241301), we get a palindrome (227383722).

The spelling of 103142421 in words is "one hundred three million, one hundred forty-two thousand, four hundred twenty-one".