405270045 has 18 divisors (see below), whose sum is σ = 702702234. Its totient is φ = 216072000.

The previous prime is 405270043. The next prime is 405270071. The reversal of 405270045 is 540072504.

It can be written as a sum of positive squares in 3 ways, for example, as 50211396 + 355058649 = 7086^2 + 18843^2 .

It is not a de Polignac number, because 405270045 - 2¹ = 405270043 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405270043) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 133545 + ... + 136545.

It is an arithmetic number, because the mean of its divisors is an integer number (39039013).

Almost surely, 2^405270045 is an apocalyptic number.

405270045 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

405270045 is a deficient number, since it is larger than the sum of its proper divisors (297432189).

405270045 is an frugal number, since it uses more digits than its factorization.

405270045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6013 (or 3009 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 405270045 is about 20131.3200014306. The cubic root of 405270045 is about 740.0280273047.

The spelling of 405270045 in words is "four hundred five million, two hundred seventy thousand, forty-five".