421161658 has 4 divisors (see below), whose sum is σ = 631742490. Its totient is φ = 210580828.

The previous prime is 421161649. The next prime is 421161667. The reversal of 421161658 is 856161124.

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

It is an interprime number because it is at equal distance from previous prime (421161649) and next prime (421161667).

It can be written as a sum of positive squares in only one way, i.e., 420947289 + 214369 = 20517^2 + 463^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105290413 + ... + 105290416.

Almost surely, 2^421161658 is an apocalyptic number.

421161658 is a deficient number, since it is larger than the sum of its proper divisors (210580832).

421161658 is a wasteful number, since it uses less digits than its factorization.

421161658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210580831.

The product of its digits is 11520, while the sum is 34.

The square root of 421161658 is about 20522.2235150093. The cubic root of 421161658 is about 749.5770403331.

The spelling of 421161658 in words is "four hundred twenty-one million, one hundred sixty-one thousand, six hundred fifty-eight".