15620061 has 4 divisors (see below), whose sum is σ = 20826752. Its totient is φ = 10413372.

The previous prime is 15620041. The next prime is 15620081. The reversal of 15620061 is 16002651.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (15620041) and next prime (15620081).

It is not a de Polignac number, because 15620061 - 2²¹ = 13522909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15620021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2603341 + ... + 2603346.

It is an arithmetic number, because the mean of its divisors is an integer number (5206688).

Almost surely, 2^15620061 is an apocalyptic number.

It is an amenable number.

15620061 is a deficient number, since it is larger than the sum of its proper divisors (5206691).

15620061 is an equidigital number, since it uses as much as digits as its factorization.

15620061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5206690.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 15620061 is about 3952.2222862587. Note that the first 4 decimals coincide. The cubic root of 15620061 is about 249.9736558907.

The spelling of 15620061 in words is "fifteen million, six hundred twenty thousand, sixty-one".