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15075061 = 97155413
BaseRepresentation
bin111001100000…
…011011110101
31001100220002121
4321200123311
512324400221
61255035541
7242064421
oct71403365
931326077
1015075061
118567131
12506bbb1
13317a871
142005b81
1514cba41
hexe606f5

15075061 has 4 divisors (see below), whose sum is σ = 15230572. Its totient is φ = 14919552.

The previous prime is 15075043. The next prime is 15075077. The reversal of 15075061 is 16057051.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16057051 = 21797369.

It can be written as a sum of positive squares in 2 ways, for example, as 3724900 + 11350161 = 1930^2 + 3369^2 .

It is a cyclic number.

It is not a de Polignac number, because 15075061 - 213 = 15066869 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 (15075001) 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, 77610 + ... + 77803.

It is an arithmetic number, because the mean of its divisors is an integer number (3807643).

Almost surely, 215075061 is an apocalyptic number.

It is an amenable number.

15075061 is a deficient number, since it is larger than the sum of its proper divisors (155511).

15075061 is an equidigital number, since it uses as much as digits as its factorization.

15075061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155510.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 15075061 is about 3882.6615871075. The cubic root of 15075061 is about 247.0318928150.

The spelling of 15075061 in words is "fifteen million, seventy-five thousand, sixty-one".

Divisors: 1 97 155413 15075061