201642154 has 32 divisors (see below), whose sum is σ = 354787200. Its totient is φ = 85913856.

The previous prime is 201642097. The next prime is 201642167. The reversal of 201642154 is 451246102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131637 + ... + 133159.

It is an arithmetic number, because the mean of its divisors is an integer number (11087100).

Almost surely, 2^201642154 is an apocalyptic number.

201642154 is a deficient number, since it is larger than the sum of its proper divisors (153145046).

201642154 is a wasteful number, since it uses less digits than its factorization.

201642154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739 (or 1725 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 201642154 is about 14200.0758448679. The cubic root of 201642154 is about 586.3997493744.

Adding to 201642154 its reverse (451246102), we get a palindrome (652888256).

The spelling of 201642154 in words is "two hundred one million, six hundred forty-two thousand, one hundred fifty-four".