1405541641 has 4 divisors (see below), whose sum is σ = 1606333312. Its totient is φ = 1204749972.

The previous prime is 1405541629. The next prime is 1405541647. The reversal of 1405541641 is 1461455041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1405541641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1405541647) 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, 100395825 + ... + 100395838.

It is an arithmetic number, because the mean of its divisors is an integer number (401583328).

Almost surely, 2^1405541641 is an apocalyptic number.

It is an amenable number.

1405541641 is a deficient number, since it is larger than the sum of its proper divisors (200791671).

1405541641 is an equidigital number, since it uses as much as digits as its factorization.

1405541641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200791670.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 1405541641 is about 37490.5540236471. The cubic root of 1405541641 is about 1120.1630398810.

Adding to 1405541641 its reverse (1461455041), we get a palindrome (2866996682).

It can be divided in two parts, 14055 and 41641, that added together give a square (55696 = 236²).

The spelling of 1405541641 in words is "one billion, four hundred five million, five hundred forty-one thousand, six hundred forty-one".