105012505 has 16 divisors (see below), whose sum is σ = 135926784. Its totient is φ = 77423040.

The previous prime is 105012473. The next prime is 105012529. The reversal of 105012505 is 505210501.

It is not a de Polignac number, because 105012505 - 2⁵ = 105012473 is a prime.

It is a super-2 number, since 2×105012505² = 22055252412750050, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66232 + ... + 67798.

It is an arithmetic number, because the mean of its divisors is an integer number (8495424).

Almost surely, 2^105012505 is an apocalyptic number.

It is an amenable number.

105012505 is a deficient number, since it is larger than the sum of its proper divisors (30914279).

105012505 is a wasteful number, since it uses less digits than its factorization.

105012505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2616.

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 105012505 is about 10247.5609293139. The cubic root of 105012505 is about 471.7881257845.

It can be divided in two parts, 1050 and 12505, that multiplied together give a triangular number (13130250 = T₅₁₂₄).

The spelling of 105012505 in words is "one hundred five million, twelve thousand, five hundred five".