42142357 has 2 divisors, whose sum is σ = 42142358. Its totient is φ = 42142356.

The previous prime is 42142339. The next prime is 42142363. The reversal of 42142357 is 75324124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32649796 + 9492561 = 5714^2 + 3081^2 .

It is a cyclic number.

It is not a de Polignac number, because 42142357 - 2⁷ = 42142229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42142327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21071178 + 21071179.

It is an arithmetic number, because the mean of its divisors is an integer number (21071179).

Almost surely, 2^42142357 is an apocalyptic number.

It is an amenable number.

42142357 is a deficient number, since it is larger than the sum of its proper divisors (1).

42142357 is an equidigital number, since it uses as much as digits as its factorization.

42142357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 28.

The square root of 42142357 is about 6491.7144884845. The cubic root of 42142357 is about 347.9949491714.

It can be divided in two parts, 421 and 42357, that added together give a triangular number (42778 = T₂₉₂).

The spelling of 42142357 in words is "forty-two million, one hundred forty-two thousand, three hundred fifty-seven".