1452720461721 has 4 divisors (see below), whose sum is σ = 1936960615632. Its totient is φ = 968480307812.

The previous prime is 1452720461629. The next prime is 1452720461723. The reversal of 1452720461721 is 1271640272541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1452720461721 - 2³⁷ = 1315281508249 is a prime.

It is a super-2 number, since 2×1452720461721² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1452720461723) 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, 242120076951 + ... + 242120076956.

It is an arithmetic number, because the mean of its divisors is an integer number (484240153908).

Almost surely, 2^{1452720461721} is an apocalyptic number.

It is an amenable number.

1452720461721 is a deficient number, since it is larger than the sum of its proper divisors (484240153911).

1452720461721 is an equidigital number, since it uses as much as digits as its factorization.

1452720461721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484240153910.

The product of its (nonzero) digits is 188160, while the sum is 42.

The spelling of 1452720461721 in words is "one trillion, four hundred fifty-two billion, seven hundred twenty million, four hundred sixty-one thousand, seven hundred twenty-one".