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125131115 = 5113221471
BaseRepresentation
bin1110111010101…
…01100101101011
322201110022121202
413131111211223
5224013143430
620225554415
73046411514
oct735254553
9281408552
10125131115
11646a694a
1235aa5a0b
131cc025a5
1412893a0b
15aebad45
hex775596b

125131115 has 8 divisors (see below), whose sum is σ = 151486848. Its totient is φ = 99218560.

The previous prime is 125131103. The next prime is 125131129. The reversal of 125131115 is 511131521.

It is a happy number.

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

It is not a de Polignac number, because 125131115 - 216 = 125065579 is a prime.

It is a super-2 number, since 2×1251311152 = 31315591882286450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 110171 + ... + 111300.

It is an arithmetic number, because the mean of its divisors is an integer number (18935856).

Almost surely, 2125131115 is an apocalyptic number.

125131115 is a deficient number, since it is larger than the sum of its proper divisors (26355733).

125131115 is a wasteful number, since it uses less digits than its factorization.

125131115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221589.

The product of its digits is 150, while the sum is 20.

The square root of 125131115 is about 11186.2019917396. The cubic root of 125131115 is about 500.1747589115.

Adding to 125131115 its reverse (511131521), we get a palindrome (636262636).

The spelling of 125131115 in words is "one hundred twenty-five million, one hundred thirty-one thousand, one hundred fifteen".

Divisors: 1 5 113 565 221471 1107355 25026223 125131115