2500018 has 4 divisors (see below), whose sum is σ = 3750030. Its totient is φ = 1250008.

The previous prime is 2500009. The next prime is 2500027. The reversal of 2500018 is 8100052.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (2500009) and next prime (2500027).

It can be written as a sum of positive squares in only one way, i.e., 2411809 + 88209 = 1553^2 + 297^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2499974 and 2500010.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625003 + ... + 625006.

2^2500018 is an apocalyptic number.

2500018 is a deficient number, since it is larger than the sum of its proper divisors (1250012).

2500018 is a wasteful number, since it uses less digits than its factorization.

2500018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250011.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 2500018 is about 1581.1445221737. The cubic root of 2500018 is about 135.7212065591.

The spelling of 2500018 in words is "two million, five hundred thousand, eighteen".