3781429 has 4 divisors (see below), whose sum is σ = 4003884. Its totient is φ = 3558976.

The previous prime is 3781423. The next prime is 3781433. The reversal of 3781429 is 9241873.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9241873 = 73 ⋅126601.

It can be written as a sum of positive squares in 2 ways, for example, as 1620529 + 2160900 = 1273^2 + 1470^2 .

It is a cyclic number.

It is not a de Polignac number, because 3781429 - 2⁷ = 3781301 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3781394 and 3781403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3781423) 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 3 ways as a sum of consecutive naturals, for example, 111202 + ... + 111235.

It is an arithmetic number, because the mean of its divisors is an integer number (1000971).

Almost surely, 2^3781429 is an apocalyptic number.

It is an amenable number.

3781429 is a deficient number, since it is larger than the sum of its proper divisors (222455).

3781429 is a wasteful number, since it uses less digits than its factorization.

3781429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222454.

The product of its digits is 12096, while the sum is 34.

The square root of 3781429 is about 1944.5896739415. The cubic root of 3781429 is about 155.7944504080.

The spelling of 3781429 in words is "three million, seven hundred eighty-one thousand, four hundred twenty-nine".