42701661 has 12 divisors (see below), whose sum is σ = 63964992. Its totient is φ = 28467612.

The previous prime is 42701657. The next prime is 42701669. The reversal of 42701661 is 16610724.

It is not a de Polignac number, because 42701661 - 2² = 42701657 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42701669) 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, 87621 + ... + 88106.

It is an arithmetic number, because the mean of its divisors is an integer number (5330416).

Almost surely, 2^42701661 is an apocalyptic number.

It is an amenable number.

42701661 is a deficient number, since it is larger than the sum of its proper divisors (21263331).

42701661 is an equidigital number, since it uses as much as digits as its factorization.

42701661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175742 (or 175730 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 42701661 is about 6534.6507940364. The cubic root of 42701661 is about 349.5276921822.

The spelling of 42701661 in words is "forty-two million, seven hundred one thousand, six hundred sixty-one".