42177639 has 32 divisors (see below), whose sum is σ = 67403776. Its totient is φ = 22952160.

The previous prime is 42177631. The next prime is 42177647. The reversal of 42177639 is 93677124.

It is an interprime number because it is at equal distance from previous prime (42177631) and next prime (42177647).

It is not a de Polignac number, because 42177639 - 2³ = 42177631 is a prime.

It is a super-2 number, since 2×42177639² = 3557906463228642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42177597 and 42177606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42177631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43134 + ... + 44100.

It is an arithmetic number, because the mean of its divisors is an integer number (2106368).

Almost surely, 2^42177639 is an apocalyptic number.

42177639 is a deficient number, since it is larger than the sum of its proper divisors (25226137).

42177639 is a wasteful number, since it uses less digits than its factorization.

42177639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075.

The product of its digits is 63504, while the sum is 39.

The square root of 42177639 is about 6494.4313838857. The cubic root of 42177639 is about 348.0920370252.

The spelling of 42177639 in words is "forty-two million, one hundred seventy-seven thousand, six hundred thirty-nine".