201970642 has 32 divisors (see below), whose sum is σ = 340139520. Its totient is φ = 89475840.

The previous prime is 201970621. The next prime is 201970649. The reversal of 201970642 is 246079102.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (201970649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36409 + ... + 41587.

It is an arithmetic number, because the mean of its divisors is an integer number (10629360).

Almost surely, 2^201970642 is an apocalyptic number.

201970642 is a deficient number, since it is larger than the sum of its proper divisors (138168878).

201970642 is a wasteful number, since it uses less digits than its factorization.

201970642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5266.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 201970642 is about 14211.6375551869. The cubic root of 201970642 is about 586.7180042167.

The spelling of 201970642 in words is "two hundred one million, nine hundred seventy thousand, six hundred forty-two".