102019402 has 8 divisors (see below), whose sum is σ = 153086976. Its totient is φ = 50990412.

The previous prime is 102019399. The next prime is 102019409. The reversal of 102019402 is 204910201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 102019402.

It is not an unprimeable number, because it can be changed into a prime (102019409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1738 + ... + 14389.

It is an arithmetic number, because the mean of its divisors is an integer number (19135872).

Almost surely, 2^102019402 is an apocalyptic number.

102019402 is a deficient number, since it is larger than the sum of its proper divisors (51067574).

102019402 is a wasteful number, since it uses less digits than its factorization.

102019402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19292.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 102019402 is about 10100.4654348203. The cubic root of 102019402 is about 467.2624959645.

Adding to 102019402 its reverse (204910201), we get a palindrome (306929603).

The spelling of 102019402 in words is "one hundred two million, nineteen thousand, four hundred two".