42291801 has 20 divisors (see below), whose sum is σ = 66895092. Its totient is φ = 26535168.

The previous prime is 42291797. The next prime is 42291811. The reversal of 42291801 is 10819224.

It can be written as a sum of positive squares in 2 ways, for example, as 35712576 + 6579225 = 5976^2 + 2565^2 .

It is not a de Polignac number, because 42291801 - 2² = 42291797 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (42291811) 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 19 ways as a sum of consecutive naturals, for example, 13980 + ... + 16733.

Almost surely, 2^42291801 is an apocalyptic number.

It is an amenable number.

42291801 is a deficient number, since it is larger than the sum of its proper divisors (24603291).

42291801 is a wasteful number, since it uses less digits than its factorization.

42291801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30742 (or 30733 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 42291801 is about 6503.2146666091. The cubic root of 42291801 is about 348.4058137420.

The spelling of 42291801 in words is "forty-two million, two hundred ninety-one thousand, eight hundred one".