420526091 has 4 divisors (see below), whose sum is σ = 423311184. Its totient is φ = 417741000.

The previous prime is 420526087. The next prime is 420526121. The reversal of 420526091 is 190625024.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420526091 - 2² = 420526087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420526081) 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 3 ways as a sum of consecutive naturals, for example, 1392320 + ... + 1392621.

It is an arithmetic number, because the mean of its divisors is an integer number (105827796).

Almost surely, 2^420526091 is an apocalyptic number.

420526091 is a deficient number, since it is larger than the sum of its proper divisors (2785093).

420526091 is a wasteful number, since it uses less digits than its factorization.

420526091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2785092.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 420526091 is about 20506.7328211980. The cubic root of 420526091 is about 749.1997930473.

The spelling of 420526091 in words is "four hundred twenty million, five hundred twenty-six thousand, ninety-one".