451121761 has 2 divisors, whose sum is σ = 451121762. Its totient is φ = 451121760.

The previous prime is 451121719. The next prime is 451121777. The reversal of 451121761 is 167121154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236206161 + 214915600 = 15369^2 + 14660^2 .

It is a cyclic number.

It is not a de Polignac number, because 451121761 - 2⁷ = 451121633 is a prime.

It is a super-2 number, since 2×451121761² = 407021686495482242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (451124761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225560880 + 225560881.

It is an arithmetic number, because the mean of its divisors is an integer number (225560881).

Almost surely, 2^451121761 is an apocalyptic number.

It is an amenable number.

451121761 is a deficient number, since it is larger than the sum of its proper divisors (1).

451121761 is an equidigital number, since it uses as much as digits as its factorization.

451121761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 28.

The square root of 451121761 is about 21239.6271389118. The cubic root of 451121761 is about 766.9456566443.

The spelling of 451121761 in words is "four hundred fifty-one million, one hundred twenty-one thousand, seven hundred sixty-one".