1525381 has 8 divisors (see below), whose sum is σ = 1792224. Its totient is φ = 1279920.

The previous prime is 1525367. The next prime is 1525409. The reversal of 1525381 is 1835251.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1525381 - 2¹³ = 1517189 is a prime.

It is a super-2 number, since 2×1525381² = 4653574390322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1525331) 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, 5191 + ... + 5476.

It is an arithmetic number, because the mean of its divisors is an integer number (224028).

2^1525381 is an apocalyptic number.

1525381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1525381 is a deficient number, since it is larger than the sum of its proper divisors (266843).

1525381 is a wasteful number, since it uses less digits than its factorization.

1525381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10691.

The product of its digits is 1200, while the sum is 25.

The square root of 1525381 is about 1235.0631562799. The cubic root of 1525381 is about 115.1134607998.

The spelling of 1525381 in words is "one million, five hundred twenty-five thousand, three hundred eighty-one".