1200213541 has 4 divisors (see below), whose sum is σ = 1229487084. Its totient is φ = 1170940000.

The previous prime is 1200213529. The next prime is 1200213551. The reversal of 1200213541 is 1453120021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1453120021 = 743 ⋅1955747.

It can be written as a sum of positive squares in 2 ways, for example, as 228644641 + 971568900 = 15121^2 + 31170^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200213541 - 2²¹ = 1198116389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200213551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14636710 + ... + 14636791.

It is an arithmetic number, because the mean of its divisors is an integer number (307371771).

Almost surely, 2^1200213541 is an apocalyptic number.

It is an amenable number.

1200213541 is a deficient number, since it is larger than the sum of its proper divisors (29273543).

1200213541 is an equidigital number, since it uses as much as digits as its factorization.

1200213541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29273542.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1200213541 is about 34644.0982131156. The cubic root of 1200213541 is about 1062.7215991033.

Adding to 1200213541 its reverse (1453120021), we get a palindrome (2653333562).

The spelling of 1200213541 in words is "one billion, two hundred million, two hundred thirteen thousand, five hundred forty-one".