42172493 has 12 divisors (see below), whose sum is σ = 47854464. Its totient is φ = 37098600.

The previous prime is 42172483. The next prime is 42172511. The reversal of 42172493 is 39427124.

42172493 = T₃₁₇ + T₃₁₈ + ... + T₆₅₇.

It is not a de Polignac number, because 42172493 - 2¹² = 42168397 is a prime.

It is a super-3 number, since 3×42172493³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42172453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1871 + ... + 9372.

It is an arithmetic number, because the mean of its divisors is an integer number (3987872).

Almost surely, 2^42172493 is an apocalyptic number.

It is an amenable number.

42172493 is a deficient number, since it is larger than the sum of its proper divisors (5681971).

42172493 is a wasteful number, since it uses less digits than its factorization.

42172493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11296 (or 11285 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 42172493 is about 6494.0351862305. The cubic root of 42172493 is about 348.0778798041.

The spelling of 42172493 in words is "forty-two million, one hundred seventy-two thousand, four hundred ninety-three".