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4995961 = 6181901
BaseRepresentation
bin10011000011101101111001
3100101211011121
4103003231321
52234332321
6255025241
760315325
oct23035571
910354147
104995961
1129025a3
12180b221
13105bcb9
14940985
1568a441
hex4c3b79

4995961 has 4 divisors (see below), whose sum is σ = 5077924. Its totient is φ = 4914000.

The previous prime is 4995953. The next prime is 4995983. The reversal of 4995961 is 1695994.

4995961 = 15802 + 15812.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1695994 = 2847997.

It can be written as a sum of positive squares in 2 ways, for example, as 2496400 + 2499561 = 1580^2 + 1581^2 .

It is a cyclic number.

It is not a de Polignac number, because 4995961 - 23 = 4995953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4995911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40890 + ... + 41011.

It is an arithmetic number, because the mean of its divisors is an integer number (1269481).

Almost surely, 24995961 is an apocalyptic number.

4995961 is the 1581-st centered square number.

It is an amenable number.

4995961 is a deficient number, since it is larger than the sum of its proper divisors (81963).

4995961 is an equidigital number, since it uses as much as digits as its factorization.

4995961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81962.

The product of its digits is 87480, while the sum is 43.

The square root of 4995961 is about 2235.1646471793. The cubic root of 4995961 is about 170.9515383117.

The spelling of 4995961 in words is "four million, nine hundred ninety-five thousand, nine hundred sixty-one".

Divisors: 1 61 81901 4995961