102420403442 has 32 divisors (see below), whose sum is σ = 182458137600. Its totient is φ = 42193391040.

The previous prime is 102420403441. The next prime is 102420403511. The reversal of 102420403442 is 244304024201.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (102420403441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 727253 + ... + 856584.

It is an arithmetic number, because the mean of its divisors is an integer number (5701816800).

Almost surely, 2^102420403442 is an apocalyptic number.

102420403442 is a deficient number, since it is larger than the sum of its proper divisors (80037734158).

102420403442 is a wasteful number, since it uses less digits than its factorization.

102420403442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584026.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 102420403442 its reverse (244304024201), we get a palindrome (346724427643).

The spelling of 102420403442 in words is "one hundred two billion, four hundred twenty million, four hundred three thousand, four hundred forty-two".