1381951 has 4 divisors (see below), whose sum is σ = 1395472. Its totient is φ = 1368432.

The previous prime is 1381921. The next prime is 1381967. The reversal of 1381951 is 1591831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1591831 = 113 ⋅14087.

It is a cyclic number.

It is not a de Polignac number, because 1381951 - 2⁹ = 1381439 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 (1381901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6606 + ... + 6811.

It is an arithmetic number, because the mean of its divisors is an integer number (348868).

2^1381951 is an apocalyptic number.

1381951 is a deficient number, since it is larger than the sum of its proper divisors (13521).

1381951 is a wasteful number, since it uses less digits than its factorization.

1381951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13520.

The product of its digits is 1080, while the sum is 28.

The square root of 1381951 is about 1175.5641199016. The cubic root of 1381951 is about 111.3860700908.

It can be divided in two parts, 1381 and 951, that added together give a palindrome (2332).

The spelling of 1381951 in words is "one million, three hundred eighty-one thousand, nine hundred fifty-one".