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4000131 = 33148153
BaseRepresentation
bin1111010000100110000011
321112020011000
433100212003
52011001011
6221423043
746000122
oct17204603
97466130
104000131
1122923a3
12140aa83
13aa0955
14761ab9
15540356
hex3d0983

4000131 has 8 divisors (see below), whose sum is σ = 5926160. Its totient is φ = 2666736.

The previous prime is 4000093. The next prime is 4000133. The reversal of 4000131 is 1310004.

It is not a de Polignac number, because 4000131 - 26 = 4000067 is a prime.

It is a super-2 number, since 2×40001312 = 32002096034322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

4000131 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74050 + ... + 74103.

It is an arithmetic number, because the mean of its divisors is an integer number (740770).

Almost surely, 24000131 is an apocalyptic number.

4000131 is a deficient number, since it is larger than the sum of its proper divisors (1926029).

4000131 is a wasteful number, since it uses less digits than its factorization.

4000131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148162 (or 148156 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 4000131 is about 2000.0327497319. The cubic root of 4000131 is about 158.7418380907.

Adding to 4000131 its reverse (1310004), we get a palindrome (5310135).

The spelling of 4000131 in words is "four million, one hundred thirty-one", and thus it is an aban number.

Divisors: 1 3 9 27 148153 444459 1333377 4000131