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311042 = 2155521
BaseRepresentation
bin1001011111100000010
3120210200002
41023330002
534423132
610400002
72433554
oct1137402
9523602
10311042
111a2766
12130002
13ab764
14814d4
1562262
hex4bf02

311042 has 4 divisors (see below), whose sum is σ = 466566. Its totient is φ = 155520.

The previous prime is 311041. The next prime is 311099. The reversal of 311042 is 240113.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 271441 + 39601 = 521^2 + 199^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (311041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77759 + ... + 77762.

2311042 is an apocalyptic number.

311042 is a deficient number, since it is larger than the sum of its proper divisors (155524).

311042 is a wasteful number, since it uses less digits than its factorization.

311042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155523.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 311042 is about 557.7113948988. The cubic root of 311042 is about 67.7547393007.

Adding to 311042 its reverse (240113), we get a palindrome (551155).

The spelling of 311042 in words is "three hundred eleven thousand, forty-two", and thus it is an iban number.

Divisors: 1 2 155521 311042