9902042 has 4 divisors (see below), whose sum is σ = 14853066. Its totient is φ = 4951020.

The previous prime is 9902023. The next prime is 9902047. The reversal of 9902042 is 2402099.

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., 6056521 + 3845521 = 2461^2 + 1961^2 .

It is not an unprimeable number, because it can be changed into a prime (9902047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2475509 + ... + 2475512.

Almost surely, 2^9902042 is an apocalyptic number.

9902042 is a deficient number, since it is larger than the sum of its proper divisors (4951024).

9902042 is a wasteful number, since it uses less digits than its factorization.

9902042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4951023.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 9902042 is about 3146.7510228806. The cubic root of 9902042 is about 214.7376789912.

The spelling of 9902042 in words is "nine million, nine hundred two thousand, forty-two".