42921801 has 12 divisors (see below), whose sum is σ = 66767428. Its totient is φ = 26413344.

The previous prime is 42921799. The next prime is 42921803. The reversal of 42921801 is 10812924.

It is an interprime number because it is at equal distance from previous prime (42921799) and next prime (42921803).

It can be written as a sum of positive squares in 2 ways, for example, as 7209225 + 35712576 = 2685^2 + 5976^2 .

It is not a de Polignac number, because 42921801 - 2¹ = 42921799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42921803) 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, 183310 + ... + 183543.

Almost surely, 2^42921801 is an apocalyptic number.

It is an amenable number.

42921801 is a deficient number, since it is larger than the sum of its proper divisors (23845627).

42921801 is a wasteful number, since it uses less digits than its factorization.

42921801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366872 (or 366869 counting only the distinct ones).

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

The square root of 42921801 is about 6551.4731931070. The cubic root of 42921801 is about 350.1273033510.

The spelling of 42921801 in words is "forty-two million, nine hundred twenty-one thousand, eight hundred one".