201970 has 16 divisors (see below), whose sum is σ = 383040. Its totient is φ = 76464.

The previous prime is 201961. The next prime is 201973. The reversal of 201970 is 79102.

201970 = T₁₃₂ + T₁₃₃ + ... + T₁₅₁.

201970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (201973) by changing a digit.

201970 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, 342 + ... + 721.

It is an arithmetic number, because the mean of its divisors is an integer number (23940).

2²⁰¹⁹⁷⁰ is an apocalyptic number.

201970 is a deficient number, since it is larger than the sum of its proper divisors (181070).

201970 is a wasteful number, since it uses less digits than its factorization.

201970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 201970 is about 449.4107252837. The cubic root of 201970 is about 58.6717382553.

The spelling of 201970 in words is "two hundred one thousand, nine hundred seventy".