102342421 has 8 divisors (see below), whose sum is σ = 106000920. Its totient is φ = 98692608.

The previous prime is 102342419. The next prime is 102342463. The reversal of 102342421 is 124243201.

It can be written as a sum of positive squares in 4 ways, for example, as 25867396 + 76475025 = 5086^2 + 8745^2 .

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 102342421 - 2¹ = 102342419 is a prime.

It is a super-2 number, since 2×102342421² = 20947942272282482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102340421) 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, 30205 + ... + 33421.

It is an arithmetic number, because the mean of its divisors is an integer number (13250115).

Almost surely, 2^102342421 is an apocalyptic number.

It is an amenable number.

102342421 is a deficient number, since it is larger than the sum of its proper divisors (3658499).

102342421 is a wasteful number, since it uses less digits than its factorization.

102342421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4343.

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

The square root of 102342421 is about 10116.4431002206. The cubic root of 102342421 is about 467.7551331226.

Adding to 102342421 its reverse (124243201), we get a palindrome (226585622).

The spelling of 102342421 in words is "one hundred two million, three hundred forty-two thousand, four hundred twenty-one".