30642505 has 4 divisors (see below), whose sum is σ = 36771012. Its totient is φ = 24514000.

The previous prime is 30642499. The next prime is 30642511. The reversal of 30642505 is 50524603.

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 (30642499) and next prime (30642511).

It can be written as a sum of positive squares in 2 ways, for example, as 3069504 + 27573001 = 1752^2 + 5251^2 .

It is not a de Polignac number, because 30642505 - 2⁷ = 30642377 is a prime.

It is a super-2 number, since 2×30642505² = 1877926225350050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30642505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3064246 + ... + 3064255.

It is an arithmetic number, because the mean of its divisors is an integer number (9192753).

Almost surely, 2^30642505 is an apocalyptic number.

It is an amenable number.

30642505 is a deficient number, since it is larger than the sum of its proper divisors (6128507).

30642505 is an equidigital number, since it uses as much as digits as its factorization.

30642505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6128506.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 30642505 is about 5535.5672699372. The cubic root of 30642505 is about 312.9258365255.

The spelling of 30642505 in words is "thirty million, six hundred forty-two thousand, five hundred five".