1451420645 has 24 divisors (see below), whose sum is σ = 1895499144. Its totient is φ = 1063213056.

The previous prime is 1451420639. The next prime is 1451420647. The reversal of 1451420645 is 5460241541.

It can be written as a sum of positive squares in 12 ways, for example, as 82864609 + 1368556036 = 9103^2 + 36994^2 .

It is not a de Polignac number, because 1451420645 - 2¹⁴ = 1451404261 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1451420647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 110129 + ... + 122601.

It is an arithmetic number, because the mean of its divisors is an integer number (78979131).

Almost surely, 2^1451420645 is an apocalyptic number.

It is an amenable number.

1451420645 is a deficient number, since it is larger than the sum of its proper divisors (444078499).

1451420645 is a wasteful number, since it uses less digits than its factorization.

1451420645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12569 (or 12532 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 1451420645 is about 38097.5149452034. The cubic root of 1451420645 is about 1132.2207209957.

The spelling of 1451420645 in words is "one billion, four hundred fifty-one million, four hundred twenty thousand, six hundred forty-five".