421751145 has 16 divisors (see below), whose sum is σ = 675288000. Its totient is φ = 224771904.

The previous prime is 421751117. The next prime is 421751173. The reversal of 421751145 is 541157124.

It is an interprime number because it is at equal distance from previous prime (421751117) and next prime (421751173).

It is not a de Polignac number, because 421751145 - 2⁶ = 421751081 is a prime.

It is a super-2 number, since 2×421751145² = 355748056617622050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13107 + ... + 31863.

It is an arithmetic number, because the mean of its divisors is an integer number (42205500).

Almost surely, 2^421751145 is an apocalyptic number.

It is an amenable number.

421751145 is a deficient number, since it is larger than the sum of its proper divisors (253536855).

421751145 is a wasteful number, since it uses less digits than its factorization.

421751145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20264.

The product of its digits is 5600, while the sum is 30.

The square root of 421751145 is about 20536.5806550166. The cubic root of 421751145 is about 749.9265972607.

The spelling of 421751145 in words is "four hundred twenty-one million, seven hundred fifty-one thousand, one hundred forty-five".