1381528 has 32 divisors (see below), whose sum is σ = 2790000. Its totient is φ = 639360.

The previous prime is 1381519. The next prime is 1381529. The reversal of 1381528 is 8251831.

It is a super-2 number, since 2×1381528² = 3817239229568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1381496 and 1381505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9198 + ... + 9346.

2^1381528 is an apocalyptic number.

It is an amenable number.

1381528 is an abundant number, since it is smaller than the sum of its proper divisors (1408472).

1381528 is a wasteful number, since it uses less digits than its factorization.

1381528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 231 counting only the distinct ones).

The product of its digits is 1920, while the sum is 28.

The square root of 1381528 is about 1175.3841925090. The cubic root of 1381528 is about 111.3747042475.

The spelling of 1381528 in words is "one million, three hundred eighty-one thousand, five hundred twenty-eight".