102406142 has 4 divisors (see below), whose sum is σ = 153609216. Its totient is φ = 51203070.

The previous prime is 102406141. The next prime is 102406247. The reversal of 102406142 is 241604201.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102406141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25601534 + ... + 25601537.

It is an arithmetic number, because the mean of its divisors is an integer number (38402304).

Almost surely, 2^102406142 is an apocalyptic number.

102406142 is a deficient number, since it is larger than the sum of its proper divisors (51203074).

102406142 is an equidigital number, since it uses as much as digits as its factorization.

102406142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51203073.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 102406142 is about 10119.5919878224. The cubic root of 102406142 is about 467.8521917380.

The spelling of 102406142 in words is "one hundred two million, four hundred six thousand, one hundred forty-two".