42771620 has 24 divisors (see below), whose sum is σ = 90833400. Its totient is φ = 16915712.

The previous prime is 42771611. The next prime is 42771629. The reversal of 42771620 is 2617724.

It is an interprime number because it is at equal distance from previous prime (42771611) and next prime (42771629).

It can be written as a sum of positive squares in 4 ways, for example, as 11142244 + 31629376 = 3338^2 + 5624^2 .

It is a super-2 number, since 2×42771620² = 3658822954848800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42771629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10235 + ... + 13794.

It is an arithmetic number, because the mean of its divisors is an integer number (3784725).

Almost surely, 2^42771620 is an apocalyptic number.

It is an amenable number.

42771620 is an abundant number, since it is smaller than the sum of its proper divisors (48061780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42771620 is a wasteful number, since it uses less digits than its factorization.

42771620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24127 (or 24125 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 42771620 is about 6540.0015290518. The cubic root of 42771620 is about 349.7184674795.

The spelling of 42771620 in words is "forty-two million, seven hundred seventy-one thousand, six hundred twenty".