1339137298521 has 45 divisors (see below), whose sum is σ = 2199018506223. Its totient is φ = 811528930080.

The previous prime is 1339137298459. The next prime is 1339137298579. The reversal of 1339137298521 is 1258927319331.

It is a happy number.

The square root of 1339137298521 is 1157211.

It is a perfect power (a square), and thus also a powerful number.

1339137298521 is a `hidden beast` number, since 1 + 3 + 3 + 91 + 3 + 7 + 29 + 8 + 521 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1327705412121 + 11431886400 = 1152261^2 + 106920^2 .

It is not a de Polignac number, because 1339137298521 - 2¹¹ = 1339137296473 is a prime.

It is a super-3 number, since 3×1339137298521³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1339135298521) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 114558045 + ... + 114569733.

Almost surely, 2^{1339137298521} is an apocalyptic number.

1339137298521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1339137298521 is the 1157211-st square number.

1339137298521 is the 578606-th centered octagonal number.

It is an amenable number.

1339137298521 is a deficient number, since it is larger than the sum of its proper divisors (859881207702).

1339137298521 is an frugal number, since it uses more digits than its factorization.

1339137298521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23412 (or 11703 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The spelling of 1339137298521 in words is "one trillion, three hundred thirty-nine billion, one hundred thirty-seven million, two hundred ninety-eight thousand, five hundred twenty-one".