42667951 has 2 divisors, whose sum is σ = 42667952. Its totient is φ = 42667950.

The previous prime is 42667949. The next prime is 42667957. The reversal of 42667951 is 15976624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42667951 - 2¹ = 42667949 is a prime.

Together with 42667949, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42667957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21333975 + 21333976.

It is an arithmetic number, because the mean of its divisors is an integer number (21333976).

Almost surely, 2^42667951 is an apocalyptic number.

42667951 is a deficient number, since it is larger than the sum of its proper divisors (1).

42667951 is an equidigital number, since it uses as much as digits as its factorization.

42667951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 40.

The square root of 42667951 is about 6532.0709579734. The cubic root of 42667951 is about 349.4356920109.

The spelling of 42667951 in words is "forty-two million, six hundred sixty-seven thousand, nine hundred fifty-one".