1405706545 has 16 divisors (see below), whose sum is σ = 1809138240. Its totient is φ = 1045272384.

The previous prime is 1405706543. The next prime is 1405706567. The reversal of 1405706545 is 5456075041.

It is a happy number.

It is not a de Polignac number, because 1405706545 - 2¹ = 1405706543 is a prime.

It is a super-3 number, since 3×1405706545³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1405706543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134559 + ... + 144628.

It is an arithmetic number, because the mean of its divisors is an integer number (113071140).

Almost surely, 2^1405706545 is an apocalyptic number.

It is an amenable number.

1405706545 is a deficient number, since it is larger than the sum of its proper divisors (403431695).

1405706545 is a wasteful number, since it uses less digits than its factorization.

1405706545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279264.

The product of its (nonzero) digits is 84000, while the sum is 37.

The square root of 1405706545 is about 37492.7532331249. The cubic root of 1405706545 is about 1120.2068455658.

The spelling of 1405706545 in words is "one billion, four hundred five million, seven hundred six thousand, five hundred forty-five".