42117646 has 8 divisors (see below), whose sum is σ = 65923344. Its totient is φ = 20143200.

The previous prime is 42117643. The next prime is 42117659. The reversal of 42117646 is 64671124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×42117646² = 3547792209162632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42117643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457755 + ... + 457846.

It is an arithmetic number, because the mean of its divisors is an integer number (8240418).

Almost surely, 2^42117646 is an apocalyptic number.

42117646 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

42117646 is a deficient number, since it is larger than the sum of its proper divisors (23805698).

42117646 is a wasteful number, since it uses less digits than its factorization.

42117646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915626.

The product of its digits is 8064, while the sum is 31.

The square root of 42117646 is about 6489.8109371537. The cubic root of 42117646 is about 347.9269179780.

The spelling of 42117646 in words is "forty-two million, one hundred seventeen thousand, six hundred forty-six".