42111249 has 16 divisors (see below), whose sum is σ = 56859072. Its totient is φ = 27721728.

The previous prime is 42111247. The next prime is 42111253. The reversal of 42111249 is 94211124.

42111249 = 236² + 237² + ... + 518².

It is not a de Polignac number, because 42111249 - 2¹ = 42111247 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42111247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148662 + ... + 148944.

It is an arithmetic number, because the mean of its divisors is an integer number (3553692).

Almost surely, 2^42111249 is an apocalyptic number.

It is an amenable number.

42111249 is a deficient number, since it is larger than the sum of its proper divisors (14747823).

42111249 is a wasteful number, since it uses less digits than its factorization.

42111249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736.

The product of its digits is 576, while the sum is 24.

The square root of 42111249 is about 6489.3180689499. The cubic root of 42111249 is about 347.9093022326.

It can be divided in two parts, 4211 and 1249, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 42111249 in words is "forty-two million, one hundred eleven thousand, two hundred forty-nine".