42111145 has 16 divisors (see below), whose sum is σ = 51729552. Its totient is φ = 32901120.

The previous prime is 42111131. The next prime is 42111211. The reversal of 42111145 is 54111124.

It can be written as a sum of positive squares in 8 ways, for example, as 4214809 + 37896336 = 2053^2 + 6156^2 .

It is not a de Polignac number, because 42111145 - 2⁹ = 42110633 is a prime.

It is a super-2 number, since 2×42111145² = 3546697066422050, which contains 22 as substring.

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, 40735 + ... + 41755.

It is an arithmetic number, because the mean of its divisors is an integer number (3233097).

Almost surely, 2^42111145 is an apocalyptic number.

It is an amenable number.

42111145 is a deficient number, since it is larger than the sum of its proper divisors (9618407).

42111145 is a wasteful number, since it uses less digits than its factorization.

42111145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212.

The product of its digits is 160, while the sum is 19.

The square root of 42111145 is about 6489.3100557763. The cubic root of 42111145 is about 347.9090158277.

Adding to 42111145 its reverse (54111124), we get a palindrome (96222269).

It can be divided in two parts, 4211 and 1145, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 42111145 in words is "forty-two million, one hundred eleven thousand, one hundred forty-five".