1381501 has 4 divisors (see below), whose sum is σ = 1507104. Its totient is φ = 1255900.

The previous prime is 1381493. The next prime is 1381507. The reversal of 1381501 is 1051831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1051831 = 11 ⋅95621.

It is a cyclic number.

It is not a de Polignac number, because 1381501 - 2³ = 1381493 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 (1381507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62785 + ... + 62806.

It is an arithmetic number, because the mean of its divisors is an integer number (376776).

2^1381501 is an apocalyptic number.

1381501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1381501 is a deficient number, since it is larger than the sum of its proper divisors (125603).

1381501 is a wasteful number, since it uses less digits than its factorization.

1381501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125602.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1381501 is about 1175.3727068466. The cubic root of 1381501 is about 111.3739786894.

The spelling of 1381501 in words is "one million, three hundred eighty-one thousand, five hundred one".