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15072141 = 372924749
BaseRepresentation
bin111001011111…
…101110001101
31001100202002110
4321133232031
512324302031
61255014233
7242053050
oct71375615
931322073
1015072141
118564a17
12506a379
133179436
142004a97
1514cac46
hexe5fb8d

15072141 has 16 divisors (see below), whose sum is σ = 23760000. Its totient is φ = 8315328.

The previous prime is 15072131. The next prime is 15072191. The reversal of 15072141 is 14127051.

It is a happy number.

It is not a de Polignac number, because 15072141 - 26 = 15072077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15072131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11766 + ... + 12983.

It is an arithmetic number, because the mean of its divisors is an integer number (1485000).

Almost surely, 215072141 is an apocalyptic number.

It is an amenable number.

15072141 is a deficient number, since it is larger than the sum of its proper divisors (8687859).

15072141 is a wasteful number, since it uses less digits than its factorization.

15072141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24788.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 15072141 is about 3882.2855381849. The cubic root of 15072141 is about 247.0159419740.

Adding to 15072141 its reverse (14127051), we get a palindrome (29199192).

The spelling of 15072141 in words is "fifteen million, seventy-two thousand, one hundred forty-one".

Divisors: 1 3 7 21 29 87 203 609 24749 74247 173243 519729 717721 2153163 5024047 15072141