102423142 has 4 divisors (see below), whose sum is σ = 153634716. Its totient is φ = 51211570.

The previous prime is 102423137. The next prime is 102423143. The reversal of 102423142 is 241324201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241324201 = 251 ⋅961451.

It is a super-3 number, since 3×102423142³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102423143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25605784 + ... + 25605787.

It is an arithmetic number, because the mean of its divisors is an integer number (38408679).

Almost surely, 2^102423142 is an apocalyptic number.

102423142 is a deficient number, since it is larger than the sum of its proper divisors (51211574).

102423142 is an equidigital number, since it uses as much as digits as its factorization.

102423142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51211573.

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

The square root of 102423142 is about 10120.4319077794. The cubic root of 102423142 is about 467.8780790107.

Adding to 102423142 its reverse (241324201), we get a palindrome (343747343).

The spelling of 102423142 in words is "one hundred two million, four hundred twenty-three thousand, one hundred forty-two".