102106402 has 4 divisors (see below), whose sum is σ = 153159606. Its totient is φ = 51053200.

The previous prime is 102106397. The next prime is 102106409. The reversal of 102106402 is 204601201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204601201 = 7 ⋅29228743.

It can be written as a sum of positive squares in only one way, i.e., 59582961 + 42523441 = 7719^2 + 6521^2 .

It is not an unprimeable number, because it can be changed into a prime (102106409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25526599 + ... + 25526602.

Almost surely, 2^102106402 is an apocalyptic number.

102106402 is a deficient number, since it is larger than the sum of its proper divisors (51053204).

102106402 is an equidigital number, since it uses as much as digits as its factorization.

102106402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51053203.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 102106402 is about 10104.7712492664. The cubic root of 102106402 is about 467.3952821018.

Adding to 102106402 its reverse (204601201), we get a palindrome (306707603).

The spelling of 102106402 in words is "one hundred two million, one hundred six thousand, four hundred two".