42291557 has 24 divisors (see below), whose sum is σ = 54264000. Its totient is φ = 32922120.

The previous prime is 42291553. The next prime is 42291559. The reversal of 42291557 is 75519224.

It is not a de Polignac number, because 42291557 - 2² = 42291553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42291551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40994 + ... + 42012.

It is an arithmetic number, because the mean of its divisors is an integer number (2261000).

Almost surely, 2^42291557 is an apocalyptic number.

It is an amenable number.

42291557 is a deficient number, since it is larger than the sum of its proper divisors (11972443).

42291557 is a wasteful number, since it uses less digits than its factorization.

42291557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062 (or 1037 counting only the distinct ones).

The product of its digits is 25200, while the sum is 35.

The square root of 42291557 is about 6503.1959066293. The cubic root of 42291557 is about 348.4051437053.

The spelling of 42291557 in words is "forty-two million, two hundred ninety-one thousand, five hundred fifty-seven".