1451071649 has 2 divisors, whose sum is σ = 1451071650. Its totient is φ = 1451071648.

The previous prime is 1451071639. The next prime is 1451071663. The reversal of 1451071649 is 9461701541.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 858490000 + 592581649 = 29300^2 + 24343^2 .

It is an emirp because it is prime and its reverse (9461701541) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1451071649 is a prime.

It is a super-3 number, since 3×1451071649³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1451071639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 725535824 + 725535825.

It is an arithmetic number, because the mean of its divisors is an integer number (725535825).

Almost surely, 2^1451071649 is an apocalyptic number.

It is an amenable number.

1451071649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1451071649 is an equidigital number, since it uses as much as digits as its factorization.

1451071649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 1451071649 is about 38092.9343710878. The cubic root of 1451071649 is about 1132.1299657349.

The spelling of 1451071649 in words is "one billion, four hundred fifty-one million, seventy-one thousand, six hundred forty-nine".