1506381 has 16 divisors (see below), whose sum is σ = 2119488. Its totient is φ = 950400.

The previous prime is 1506371. The next prime is 1506389. The reversal of 1506381 is 1836051.

It is not a de Polignac number, because 1506381 - 2⁶ = 1506317 is a prime.

It is a super-2 number, since 2×1506381² = 4538367434322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1506389) 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 15 ways as a sum of consecutive naturals, for example, 4386 + ... + 4716.

It is an arithmetic number, because the mean of its divisors is an integer number (132468).

2^1506381 is an apocalyptic number.

It is an amenable number.

1506381 is a deficient number, since it is larger than the sum of its proper divisors (613107).

1506381 is a wasteful number, since it uses less digits than its factorization.

1506381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1506381 is about 1227.3471391583. The cubic root of 1506381 is about 114.6335151069.

The spelling of 1506381 in words is "one million, five hundred six thousand, three hundred eighty-one".