1405541331 has 6 divisors (see below), whose sum is σ = 2030226380. Its totient is φ = 937027548.

The previous prime is 1405541309. The next prime is 1405541341. The reversal of 1405541331 is 1331455041.

It is a happy number.

It is not a de Polignac number, because 1405541331 - 2¹⁰ = 1405540307 is a prime.

It is a super-2 number, since 2×1405541331² = 3951092866298503122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1405541295 and 1405541304.

It is not an unprimeable number, because it can be changed into a prime (1405541341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78085621 + ... + 78085638.

Almost surely, 2^1405541331 is an apocalyptic number.

1405541331 is a deficient number, since it is larger than the sum of its proper divisors (624685049).

1405541331 is a wasteful number, since it uses less digits than its factorization.

1405541331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156171265 (or 156171262 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1405541331 is about 37490.5498892721. The cubic root of 1405541331 is about 1120.1629575283.

Adding to 1405541331 its reverse (1331455041), we get a palindrome (2736996372).

The spelling of 1405541331 in words is "one billion, four hundred five million, five hundred forty-one thousand, three hundred thirty-one".