1381925445 has 32 divisors (see below), whose sum is σ = 2350778112. Its totient is φ = 691671552.

The previous prime is 1381925411. The next prime is 1381925449. The reversal of 1381925445 is 5445291831.

It is not a de Polignac number, because 1381925445 - 2⁶ = 1381925381 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1381925397 and 1381925406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381925449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19504 + ... + 56073.

It is an arithmetic number, because the mean of its divisors is an integer number (73461816).

Almost surely, 2^1381925445 is an apocalyptic number.

1381925445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1381925445 is a deficient number, since it is larger than the sum of its proper divisors (968852667).

1381925445 is a wasteful number, since it uses less digits than its factorization.

1381925445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75661.

The product of its digits is 172800, while the sum is 42.

The square root of 1381925445 is about 37174.2578271578. The cubic root of 1381925445 is about 1113.8538350389.

The spelling of 1381925445 in words is "one billion, three hundred eighty-one million, nine hundred twenty-five thousand, four hundred forty-five".