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15142007 = 64323549
BaseRepresentation
bin111001110000…
…110001110111
31001111021221002
4321300301313
512334021012
61300313515
7242463536
oct71606167
931437832
1015142007
118602461
1250a289b
1331a218a
14202231d
1514e17c2
hexe70c77

15142007 has 4 divisors (see below), whose sum is σ = 15166200. Its totient is φ = 15117816.

The previous prime is 15141983. The next prime is 15142013. The reversal of 15142007 is 70024151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70024151 = 80118741.

It is a cyclic number.

It is not a de Polignac number, because 15142007 - 214 = 15125623 is a prime.

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 15142007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15142097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11132 + ... + 12417.

It is an arithmetic number, because the mean of its divisors is an integer number (3791550).

Almost surely, 215142007 is an apocalyptic number.

15142007 is a deficient number, since it is larger than the sum of its proper divisors (24193).

15142007 is an equidigital number, since it uses as much as digits as its factorization.

15142007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24192.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 15142007 is about 3891.2731849614. The cubic root of 15142007 is about 247.3970295735.

Adding to 15142007 its reverse (70024151), we get a palindrome (85166158).

The spelling of 15142007 in words is "fifteen million, one hundred forty-two thousand, seven".

Divisors: 1 643 23549 15142007