Search a number
3781141 = 713371123
BaseRepresentation
bin1110011011001000010101
321010002202021
432123020111
51431444031
6213013141
744065510
oct16331025
97102667
103781141
112152911
1213241b1
13a25080
14705d77
154ea511
hex39b215

3781141 has 16 divisors (see below), whose sum is σ = 4783744. Its totient is φ = 2908224.

The previous prime is 3781121. The next prime is 3781147. The reversal of 3781141 is 1411873.

3781141 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a 5-Lehmer number, since φ(3781141) divides (3781141-1)5.

It is a cyclic number.

It is not a de Polignac number, because 3781141 - 217 = 3650069 is a prime.

It is a deceptive number, since it divides R3781140.

3781141 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3781147) 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 15 ways as a sum of consecutive naturals, for example, 2806 + ... + 3928.

It is an arithmetic number, because the mean of its divisors is an integer number (298984).

Almost surely, 23781141 is an apocalyptic number.

3781141 is the 1123-rd octagonal number.

It is an amenable number.

3781141 is a deficient number, since it is larger than the sum of its proper divisors (1002603).

3781141 is a wasteful number, since it uses less digits than its factorization.

3781141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180.

The product of its digits is 672, while the sum is 25.

The square root of 3781141 is about 1944.5156209195. The cubic root of 3781141 is about 155.7904951184.

The spelling of 3781141 in words is "three million, seven hundred eighty-one thousand, one hundred forty-one".