1451991025 has 9 divisors (see below), whose sum is σ = 1800705153. Its totient is φ = 1161440400.

The previous prime is 1451990999. The next prime is 1451991043. The reversal of 1451991025 is 5201991541.

The square root of 1451991025 is 38105.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 125283249 + 1326707776 = 11193^2 + 36424^2 .

It is not a de Polignac number, because 1451991025 - 2¹¹ = 1451988977 is a prime.

It is a super-3 number, since 3×1451991025³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 186715 + ... + 194335.

Almost surely, 2^1451991025 is an apocalyptic number.

1451991025 is the 38105-th square number.

1451991025 is the 19053-rd centered octagonal number.

It is an amenable number.

1451991025 is a deficient number, since it is larger than the sum of its proper divisors (348714128).

1451991025 is an frugal number, since it uses more digits than its factorization.

1451991025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15252 (or 7626 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 37.

The cubic root of 1451991025 is about 1132.3690151241.

The spelling of 1451991025 in words is "one billion, four hundred fifty-one million, nine hundred ninety-one thousand, twenty-five".