Search a number
142390 = 2529491
BaseRepresentation
bin100010110000110110
321020022201
4202300312
514024030
63015114
71132063
oct426066
9236281
10142390
1197a86
126a49a
134ca71
1439c6a
152c2ca
hex22c36

142390 has 16 divisors (see below), whose sum is σ = 265680. Its totient is φ = 54880.

The previous prime is 142381. The next prime is 142391. The reversal of 142390 is 93241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142391) by changing a digit.

142390 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45 + ... + 535.

It is an arithmetic number, because the mean of its divisors is an integer number (16605).

2142390 is an apocalyptic number.

142390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142390 is a deficient number, since it is larger than the sum of its proper divisors (123290).

142390 is a wasteful number, since it uses less digits than its factorization.

142390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 142390 is about 377.3459950761. The cubic root of 142390 is about 52.2187530180.

The spelling of 142390 in words is "one hundred forty-two thousand, three hundred ninety".