1202542101 has 24 divisors (see below), whose sum is σ = 1817127000. Its totient is φ = 765338112.

The previous prime is 1202542007. The next prime is 1202542153. The reversal of 1202542101 is 1012452021.

1202542101 is a `hidden beast` number, since 1 + 20 + 2 + 542 + 101 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 87048900 + 1115493201 = 9330^2 + 33399^2 .

It is not a de Polignac number, because 1202542101 - 2¹⁹ = 1202017813 is a prime.

It is a super-2 number, since 2×1202542101² = 2892215009354988402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202542181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2656 + ... + 49113.

It is an arithmetic number, because the mean of its divisors is an integer number (75713625).

Almost surely, 2^1202542101 is an apocalyptic number.

It is an amenable number.

1202542101 is a deficient number, since it is larger than the sum of its proper divisors (614584899).

1202542101 is a wasteful number, since it uses less digits than its factorization.

1202542101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51893 (or 51890 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1202542101 is about 34677.6888070702. The cubic root of 1202542101 is about 1063.4084247657.

Adding to 1202542101 its reverse (1012452021), we get a palindrome (2214994122).

The spelling of 1202542101 in words is "one billion, two hundred two million, five hundred forty-two thousand, one hundred one".