1543120101 has 6 divisors (see below), whose sum is σ = 2228951270. Its totient is φ = 1028746728.

The previous prime is 1543120091. The next prime is 1543120123. The reversal of 1543120101 is 1010213451.

1543120101 is a `hidden beast` number, since 1 + 543 + 1 + 20 + 101 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1486102500 + 57017601 = 38550^2 + 7551^2 .

It is not a de Polignac number, because 1543120101 - 2²³ = 1534731493 is a prime.

It is a super-2 number, since 2×1543120101² = 4762439292220500402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1543120171) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85728886 + ... + 85728903.

Almost surely, 2^1543120101 is an apocalyptic number.

It is an amenable number.

1543120101 is a deficient number, since it is larger than the sum of its proper divisors (685831169).

1543120101 is a wasteful number, since it uses less digits than its factorization.

1543120101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171457795 (or 171457792 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1543120101 is about 39282.5673931835. The cubic root of 1543120101 is about 1155.5797146046.

Adding to 1543120101 its reverse (1010213451), we get a palindrome (2553333552).

The spelling of 1543120101 in words is "one billion, five hundred forty-three million, one hundred twenty thousand, one hundred one".