1445551725 has 48 divisors (see below), whose sum is σ = 2499840000. Its totient is φ = 735683520.

The previous prime is 1445551691. The next prime is 1445551739. The reversal of 1445551725 is 5271555441.

It is not a de Polignac number, because 1445551725 - 2⁸ = 1445551469 is a prime.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1032576 + ... + 1033974.

It is an arithmetic number, because the mean of its divisors is an integer number (52080000).

Almost surely, 2^1445551725 is an apocalyptic number.

1445551725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1445551725 is a deficient number, since it is larger than the sum of its proper divisors (1054288275).

1445551725 is a wasteful number, since it uses less digits than its factorization.

1445551725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034 (or 2029 counting only the distinct ones).

The product of its digits is 140000, while the sum is 39.

The square root of 1445551725 is about 38020.4119520028. The cubic root of 1445551725 is about 1130.6925884451.

The spelling of 1445551725 in words is "one billion, four hundred forty-five million, five hundred fifty-one thousand, seven hundred twenty-five".