421261558 has 4 divisors (see below), whose sum is σ = 631892340. Its totient is φ = 210630778.

The previous prime is 421261541. The next prime is 421261571. The reversal of 421261558 is 855162124.

It is a happy number.

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

It is a super-2 number, since 2×421261558² = 354922600497174728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105315388 + ... + 105315391.

It is an arithmetic number, because the mean of its divisors is an integer number (157973085).

Almost surely, 2^421261558 is an apocalyptic number.

421261558 is a deficient number, since it is larger than the sum of its proper divisors (210630782).

421261558 is a wasteful number, since it uses less digits than its factorization.

421261558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210630781.

The product of its digits is 19200, while the sum is 34.

The square root of 421261558 is about 20524.6573174804. The cubic root of 421261558 is about 749.6363024755.

The spelling of 421261558 in words is "four hundred twenty-one million, two hundred sixty-one thousand, five hundred fifty-eight".