1252843529261 has 16 divisors (see below), whose sum is σ = 1364531054400. Its totient is φ = 1145747232000.

The previous prime is 1252843529257. The next prime is 1252843529323. The reversal of 1252843529261 is 1629253482521.

It is a cyclic number.

It is not a de Polignac number, because 1252843529261 - 2² = 1252843529257 is a prime.

It is a super-2 number, since 2×1252843529261² (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 (1252843529221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2558021 + ... + 3008181.

It is an arithmetic number, because the mean of its divisors is an integer number (85283190900).

Almost surely, 2^{1252843529261} is an apocalyptic number.

It is an amenable number.

1252843529261 is a deficient number, since it is larger than the sum of its proper divisors (111687525139).

1252843529261 is a wasteful number, since it uses less digits than its factorization.

1252843529261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455260.

The product of its digits is 2073600, while the sum is 50.

The spelling of 1252843529261 in words is "one trillion, two hundred fifty-two billion, eight hundred forty-three million, five hundred twenty-nine thousand, two hundred sixty-one".