1200231541 has 2 divisors, whose sum is σ = 1200231542. Its totient is φ = 1200231540.

The previous prime is 1200231533. The next prime is 1200231589. The reversal of 1200231541 is 1451320021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1120843441 + 79388100 = 33479^2 + 8910^2 .

It is an emirp because it is prime and its reverse (1451320021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1200231541 - 2³ = 1200231533 is a prime.

It is a super-2 number, since 2×1200231541² = 2881111504022469362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200237541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600115770 + 600115771.

It is an arithmetic number, because the mean of its divisors is an integer number (600115771).

Almost surely, 2^1200231541 is an apocalyptic number.

It is an amenable number.

1200231541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200231541 is an equidigital number, since it uses as much as digits as its factorization.

1200231541 is an evil number, because the sum of its binary digits is even.

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

The square root of 1200231541 is about 34644.3579966493. The cubic root of 1200231541 is about 1062.7269117394.

Adding to 1200231541 its reverse (1451320021), we get a palindrome (2651551562).

The spelling of 1200231541 in words is "one billion, two hundred million, two hundred thirty-one thousand, five hundred forty-one".