421156045 has 8 divisors (see below), whose sum is σ = 535116024. Its totient is φ = 317105664.

The previous prime is 421156039. The next prime is 421156069. The reversal of 421156045 is 540651124.

It can be written as a sum of positive squares in 4 ways, for example, as 127170729 + 293985316 = 11277^2 + 17146^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421156045 is a prime.

It is a super-3 number, since 3×421156045³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2477304 + ... + 2477473.

It is an arithmetic number, because the mean of its divisors is an integer number (66889503).

Almost surely, 2^421156045 is an apocalyptic number.

It is an amenable number.

421156045 is a deficient number, since it is larger than the sum of its proper divisors (113959979).

421156045 is a wasteful number, since it uses less digits than its factorization.

421156045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4954799.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 421156045 is about 20522.0867603663. The cubic root of 421156045 is about 749.5737103413.

The spelling of 421156045 in words is "four hundred twenty-one million, one hundred fifty-six thousand, forty-five".