102340242 has 12 divisors (see below), whose sum is σ = 221737230. Its totient is φ = 34113408.

The previous prime is 102340237. The next prime is 102340247. The reversal of 102340242 is 242043201.

It is an interprime number because it is at equal distance from previous prime (102340237) and next prime (102340247).

It can be written as a sum of positive squares in only one way, i.e., 60233121 + 42107121 = 7761^2 + 6489^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 5685569 = 102340242 / (1 + 0 + 2 + 3 + 4 + 0 + 2 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (102340247) 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, 2842767 + ... + 2842802.

Almost surely, 2^102340242 is an apocalyptic number.

102340242 is an abundant number, since it is smaller than the sum of its proper divisors (119396988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102340242 is a wasteful number, since it uses less digits than its factorization.

102340242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5685577 (or 5685574 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 102340242 is about 10116.3354036924. The cubic root of 102340242 is about 467.7518133990.

Adding to 102340242 its reverse (242043201), we get a palindrome (344383443).

The spelling of 102340242 in words is "one hundred two million, three hundred forty thousand, two hundred forty-two".