42266251 has 4 divisors (see below), whose sum is σ = 42282504. Its totient is φ = 42250000.

The previous prime is 42266239. The next prime is 42266269. The reversal of 42266251 is 15266224.

42266251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a 4-Lehmer number, since φ(42266251) divides (42266251-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 42266251 - 2⁵ = 42266219 is a prime.

It is a deceptive number, since it divides R_42266250.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42266201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3250 + ... + 9751.

It is an arithmetic number, because the mean of its divisors is an integer number (10570626).

Almost surely, 2^42266251 is an apocalyptic number.

42266251 is the 3251-st decagonal number.

42266251 is a deficient number, since it is larger than the sum of its proper divisors (16253).

42266251 is a wasteful number, since it uses less digits than its factorization.

42266251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16252.

The product of its digits is 5760, while the sum is 28.

The square root of 42266251 is about 6501.2499567391. The cubic root of 42266251 is about 348.3356381086.

The spelling of 42266251 in words is "forty-two million, two hundred sixty-six thousand, two hundred fifty-one".