49142857 has 2 divisors, whose sum is σ = 49142858. Its totient is φ = 49142856.

The previous prime is 49142837. The next prime is 49142861. The reversal of 49142857 is 75824194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45441081 + 3701776 = 6741^2 + 1924^2 .

It is a cyclic number.

It is not a de Polignac number, because 49142857 - 2¹⁹ = 48618569 is a prime.

49142857 is a modest number, since divided by 142857 gives 49 as remainder.

It is not a weakly prime, because it can be changed into another prime (49142827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24571428 + 24571429.

It is an arithmetic number, because the mean of its divisors is an integer number (24571429).

Almost surely, 2^49142857 is an apocalyptic number.

It is an amenable number.

49142857 is a deficient number, since it is larger than the sum of its proper divisors (1).

49142857 is an equidigital number, since it uses as much as digits as its factorization.

49142857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 40.

The square root of 49142857 is about 7010.1966448881. The cubic root of 49142857 is about 366.2858432695.

The spelling of 49142857 in words is "forty-nine million, one hundred forty-two thousand, eight hundred fifty-seven".