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15138061 = 412511471
BaseRepresentation
bin111001101111…
…110100001101
31001111002111221
4321233310031
512333404221
61300243341
7242446201
oct71576415
931432457
1015138061
1185aa4a4
1250a0551
1331a0443
142020b01
1514e0541
hexe6fd0d

15138061 has 8 divisors (see below), whose sum is σ = 15579648. Its totient is φ = 14700000.

The previous prime is 15138031. The next prime is 15138091. The reversal of 15138061 is 16083151.

It is an interprime number because it is at equal distance from previous prime (15138031) and next prime (15138091).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 5-Lehmer number, since φ(15138061) divides (15138061-1)5.

It is a cyclic number.

It is not a de Polignac number, because 15138061 - 219 = 14613773 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 (15138001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9556 + ... + 11026.

It is an arithmetic number, because the mean of its divisors is an integer number (1947456).

Almost surely, 215138061 is an apocalyptic number.

It is an amenable number.

15138061 is a deficient number, since it is larger than the sum of its proper divisors (441587).

15138061 is a wasteful number, since it uses less digits than its factorization.

15138061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1763.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 15138061 is about 3890.7661199306. The cubic root of 15138061 is about 247.3755371894.

The spelling of 15138061 in words is "fifteen million, one hundred thirty-eight thousand, sixty-one".

Divisors: 1 41 251 1471 10291 60311 369221 15138061