42478101 has 16 divisors (see below), whose sum is σ = 63710720. Its totient is φ = 28317276.

The previous prime is 42478099. The next prime is 42478103. The reversal of 42478101 is 10187424.

It is an interprime number because it is at equal distance from previous prime (42478099) and next prime (42478103).

It is not a de Polignac number, because 42478101 - 2¹ = 42478099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42478103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7525 + ... + 11898.

It is an arithmetic number, because the mean of its divisors is an integer number (3981920).

Almost surely, 2^42478101 is an apocalyptic number.

It is an amenable number.

42478101 is a deficient number, since it is larger than the sum of its proper divisors (21232619).

42478101 is an frugal number, since it uses more digits than its factorization.

42478101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19444 (or 19426 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 42478101 is about 6517.5226121587. The cubic root of 42478101 is about 348.9166529211.

The spelling of 42478101 in words is "forty-two million, four hundred seventy-eight thousand, one hundred one".