1298986621 has 8 divisors (see below), whose sum is σ = 1310992704. Its totient is φ = 1287031200.

The previous prime is 1298986597. The next prime is 1298986627. The reversal of 1298986621 is 1266898921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1298986621 - 2²¹ = 1296889469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298986627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39846 + ... + 64696.

It is an arithmetic number, because the mean of its divisors is an integer number (163874088).

Almost surely, 2^1298986621 is an apocalyptic number.

It is an amenable number.

1298986621 is a deficient number, since it is larger than the sum of its proper divisors (12006083).

1298986621 is a wasteful number, since it uses less digits than its factorization.

1298986621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25331.

The product of its digits is 746496, while the sum is 52.

The square root of 1298986621 is about 36041.4569766540. The cubic root of 1298986621 is about 1091.1092209751.

The spelling of 1298986621 in words is "one billion, two hundred ninety-eight million, nine hundred eighty-six thousand, six hundred twenty-one".