1051730240521 has 9 divisors (see below), whose sum is σ = 1054422994183. Its totient is φ = 1049044353880.

The previous prime is 1051730240497. The next prime is 1051730240593. The reversal of 1051730240521 is 1250420371501.

The square root of 1051730240521 is 1025539.

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

It can be written as a sum of positive squares in only one way, i.e., 1003180524921 + 48549715600 = 1001589^2 + 220340^2 .

It is not a de Polignac number, because 1051730240521 - 2⁵ = 1051730240489 is a prime.

It is a super-2 number, since 2×1051730240521² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1051730240621) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 491232111 + ... + 491234251.

Almost surely, 2^{1051730240521} is an apocalyptic number.

1051730240521 is the 1025539-th square number.

1051730240521 is the 512770-th centered octagonal number.

It is an amenable number.

1051730240521 is a deficient number, since it is larger than the sum of its proper divisors (2692753662).

1051730240521 is an frugal number, since it uses more digits than its factorization.

1051730240521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5240 (or 2620 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The spelling of 1051730240521 in words is "one trillion, fifty-one billion, seven hundred thirty million, two hundred forty thousand, five hundred twenty-one".