102664442 has 4 divisors (see below), whose sum is σ = 153996666. Its totient is φ = 51332220.

The previous prime is 102664439. The next prime is 102664453. The reversal of 102664442 is 244466201.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 99420841 + 3243601 = 9971^2 + 1801^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25666109 + ... + 25666112.

Almost surely, 2^102664442 is an apocalyptic number.

102664442 is a deficient number, since it is larger than the sum of its proper divisors (51332224).

102664442 is an equidigital number, since it uses as much as digits as its factorization.

102664442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51332223.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 102664442 is about 10132.3463225454. The cubic root of 102664442 is about 468.2452175111.

The spelling of 102664442 in words is "one hundred two million, six hundred sixty-four thousand, four hundred forty-two".