4991002 has 4 divisors (see below), whose sum is σ = 7486506. Its totient is φ = 2495500.

The previous prime is 4990981. The next prime is 4991009. The reversal of 4991002 is 2001994.

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., 3455881 + 1535121 = 1859^2 + 1239^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4991009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1247749 + ... + 1247752.

Almost surely, 2^4991002 is an apocalyptic number.

4991002 is a deficient number, since it is larger than the sum of its proper divisors (2495504).

4991002 is a wasteful number, since it uses less digits than its factorization.

4991002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495503.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 4991002 is about 2234.0550575131. The cubic root of 4991002 is about 170.8949573172.

Adding to 4991002 its reverse (2001994), we get a palindrome (6992996).

The spelling of 4991002 in words is "four million, nine hundred ninety-one thousand, two".