1305494948821 has 16 divisors (see below), whose sum is σ = 1535516636544. Its totient is φ = 1086654711744.

The previous prime is 1305494948801. The next prime is 1305494948837. The reversal of 1305494948821 is 1288494945031.

It is not a de Polignac number, because 1305494948821 - 2¹⁵ = 1305494916053 is a prime.

It is a super-2 number, since 2×1305494948821² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305494948801) 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, 12483166 + ... + 12587311.

It is an arithmetic number, because the mean of its divisors is an integer number (95969789784).

Almost surely, 2^{1305494948821} is an apocalyptic number.

It is an amenable number.

1305494948821 is a deficient number, since it is larger than the sum of its proper divisors (230021687723).

1305494948821 is a wasteful number, since it uses less digits than its factorization.

1305494948821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25070700.

The product of its (nonzero) digits is 9953280, while the sum is 58.

The spelling of 1305494948821 in words is "one trillion, three hundred five billion, four hundred ninety-four million, nine hundred forty-eight thousand, eight hundred twenty-one".