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42970 = 254297
BaseRepresentation
bin1010011111011010
32011221111
422133122
52333340
6530534
7236164
oct123732
964844
1042970
112a314
1220a4a
1316735
1411934
15caea
hexa7da

42970 has 8 divisors (see below), whose sum is σ = 77364. Its totient is φ = 17184.

The previous prime is 42967. The next prime is 42979. The reversal of 42970 is 7924.

42970 is nontrivially palindromic in base 4.

It can be written as a sum of positive squares in 2 ways, for example, as 42849 + 121 = 207^2 + 11^2 .

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

It is not an unprimeable number, because it can be changed into a prime (42979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2139 + ... + 2158.

242970 is an apocalyptic number.

42970 is a deficient number, since it is larger than the sum of its proper divisors (34394).

42970 is a wasteful number, since it uses less digits than its factorization.

42970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4304.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 42970 is about 207.2920644887. The cubic root of 42970 is about 35.0258312710.

The spelling of 42970 in words is "forty-two thousand, nine hundred seventy".

Divisors: 1 2 5 10 4297 8594 21485 42970