1405787441 has 4 divisors (see below), whose sum is σ = 1454262900. Its totient is φ = 1357311984.

The previous prime is 1405787429. The next prime is 1405787491. The reversal of 1405787441 is 1447875041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1447875041 = 53 ⋅27318397.

It can be written as a sum of positive squares in 2 ways, for example, as 1062760000 + 343027441 = 32600^2 + 18521^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1405787441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1405787491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24237686 + ... + 24237743.

It is an arithmetic number, because the mean of its divisors is an integer number (363565725).

Almost surely, 2^1405787441 is an apocalyptic number.

It is an amenable number.

1405787441 is a deficient number, since it is larger than the sum of its proper divisors (48475459).

1405787441 is an equidigital number, since it uses as much as digits as its factorization.

1405787441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48475458.

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 1405787441 is about 37493.8320394168. The cubic root of 1405787441 is about 1120.2283338143.

The spelling of 1405787441 in words is "one billion, four hundred five million, seven hundred eighty-seven thousand, four hundred forty-one".