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142490 = 2514249
BaseRepresentation
bin100010110010011010
321020110102
4202302122
514024430
63015402
71132265
oct426232
9236412
10142490
1198067
126a562
134cb1a
1439cdc
152c345
hex22c9a

142490 has 8 divisors (see below), whose sum is σ = 256500. Its totient is φ = 56992.

The previous prime is 142469. The next prime is 142501. The reversal of 142490 is 94241.

It can be written as a sum of positive squares in 2 ways, for example, as 142129 + 361 = 377^2 + 19^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

142490 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 3 ways as a sum of consecutive naturals, for example, 7115 + ... + 7134.

2142490 is an apocalyptic number.

142490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142490 is a deficient number, since it is larger than the sum of its proper divisors (114010).

142490 is a wasteful number, since it uses less digits than its factorization.

142490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14256.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 142490 is about 377.4784762076. The cubic root of 142490 is about 52.2309745068.

The spelling of 142490 in words is "one hundred forty-two thousand, four hundred ninety".

Divisors: 1 2 5 10 14249 28498 71245 142490