42878701 has 2 divisors, whose sum is σ = 42878702. Its totient is φ = 42878700.

The previous prime is 42878699. The next prime is 42878707. The reversal of 42878701 is 10787824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39363076 + 3515625 = 6274^2 + 1875^2 .

It is a cyclic number.

It is not a de Polignac number, because 42878701 - 2¹ = 42878699 is a prime.

Together with 42878699, 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 (42878707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21439350 + 21439351.

It is an arithmetic number, because the mean of its divisors is an integer number (21439351).

Almost surely, 2^42878701 is an apocalyptic number.

It is an amenable number.

42878701 is a deficient number, since it is larger than the sum of its proper divisors (1).

42878701 is an equidigital number, since it uses as much as digits as its factorization.

42878701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 42878701 is about 6548.1830304291. The cubic root of 42878701 is about 350.0100704585.

The spelling of 42878701 in words is "forty-two million, eight hundred seventy-eight thousand, seven hundred one".