1324970981 has 4 divisors (see below), whose sum is σ = 1326211500. Its totient is φ = 1323730464.

The previous prime is 1324970971. The next prime is 1324970987. The reversal of 1324970981 is 1890794231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1890794231 = 89 ⋅21244879.

It can be written as a sum of positive squares in 2 ways, for example, as 275858881 + 1049112100 = 16609^2 + 32390^2 .

It is a cyclic number.

It is not a de Polignac number, because 1324970981 - 2¹⁸ = 1324708837 is a prime.

It is a super-2 number, since 2×1324970981² = 3511096200984204722, which 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 (1324970987) 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, 618656 + ... + 620793.

It is an arithmetic number, because the mean of its divisors is an integer number (331552875).

Almost surely, 2^1324970981 is an apocalyptic number.

It is an amenable number.

1324970981 is a deficient number, since it is larger than the sum of its proper divisors (1240519).

1324970981 is a wasteful number, since it uses less digits than its factorization.

1324970981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240518.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 1324970981 is about 36400.1508375996. The cubic root of 1324970981 is about 1098.3365991252.

The spelling of 1324970981 in words is "one billion, three hundred twenty-four million, nine hundred seventy thousand, nine hundred eighty-one".