381520925 has 6 divisors (see below), whose sum is σ = 473085978. Its totient is φ = 305216720.

The previous prime is 381520921. The next prime is 381520927. The reversal of 381520925 is 529025183.

It can be written as a sum of positive squares in 3 ways, for example, as 5044516 + 376476409 = 2246^2 + 19403^2 .

It is not a de Polignac number, because 381520925 - 2² = 381520921 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381520921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7630394 + ... + 7630443.

It is an arithmetic number, because the mean of its divisors is an integer number (78847663).

Almost surely, 2^381520925 is an apocalyptic number.

It is an amenable number.

381520925 is a deficient number, since it is larger than the sum of its proper divisors (91565053).

381520925 is a wasteful number, since it uses less digits than its factorization.

381520925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15260847 (or 15260842 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 381520925 is about 19532.5606360252. The cubic root of 381520925 is about 725.2806998680.

The spelling of 381520925 in words is "three hundred eighty-one million, five hundred twenty thousand, nine hundred twenty-five".