981260405 has 6 divisors (see below), whose sum is σ = 1177596546. Its totient is φ = 784952288.

The previous prime is 981260393. The next prime is 981260459. The reversal of 981260405 is 504062189.

It can be written as a sum of positive squares in 3 ways, for example, as 340107364 + 641153041 = 18442^2 + 25321^2 .

It is not a de Polignac number, because 981260405 - 2⁶ = 981260341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63041 + ... + 77049.

It is an arithmetic number, because the mean of its divisors is an integer number (196266091).

Almost surely, 2^981260405 is an apocalyptic number.

It is an amenable number.

981260405 is a deficient number, since it is larger than the sum of its proper divisors (196336141).

981260405 is an frugal number, since it uses more digits than its factorization.

981260405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28023 (or 14014 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 981260405 is about 31325.0762967946. The cubic root of 981260405 is about 993.7140378057.

The spelling of 981260405 in words is "nine hundred eighty-one million, two hundred sixty thousand, four hundred five".