1451132661 has 32 divisors (see below), whose sum is σ = 2225258496. Its totient is φ = 832968000.

The previous prime is 1451132659. The next prime is 1451132681. The reversal of 1451132661 is 1662311541.

It is a happy number.

It is not a de Polignac number, because 1451132661 - 2¹ = 1451132659 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1451132611) 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 31 ways as a sum of consecutive naturals, for example, 32991 + ... + 63171.

It is an arithmetic number, because the mean of its divisors is an integer number (69539328).

Almost surely, 2^1451132661 is an apocalyptic number.

1451132661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1451132661 is a deficient number, since it is larger than the sum of its proper divisors (774125835).

1451132661 is a wasteful number, since it uses less digits than its factorization.

1451132661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30273.

The product of its digits is 4320, while the sum is 30.

The square root of 1451132661 is about 38093.7351935984. The cubic root of 1451132661 is about 1132.1458327542.

The spelling of 1451132661 in words is "one billion, four hundred fifty-one million, one hundred thirty-two thousand, six hundred sixty-one".