102401242 has 4 divisors (see below), whose sum is σ = 153601866. Its totient is φ = 51200620.

The previous prime is 102401239. The next prime is 102401263. The reversal of 102401242 is 242104201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242104201 = 1123 ⋅215587.

It can be written as a sum of positive squares in only one way, i.e., 102232321 + 168921 = 10111^2 + 411^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25600309 + ... + 25600312.

Almost surely, 2^102401242 is an apocalyptic number.

102401242 is a deficient number, since it is larger than the sum of its proper divisors (51200624).

102401242 is an equidigital number, since it uses as much as digits as its factorization.

102401242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51200623.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 102401242 is about 10119.3498803036. The cubic root of 102401242 is about 467.8447295804.

Adding to 102401242 its reverse (242104201), we get a palindrome (344505443).

The spelling of 102401242 in words is "one hundred two million, four hundred one thousand, two hundred forty-two".