1203421537 has 2 divisors, whose sum is σ = 1203421538. Its totient is φ = 1203421536.

The previous prime is 1203421523. The next prime is 1203421543. The reversal of 1203421537 is 7351243021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 817731216 + 385690321 = 28596^2 + 19639^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203421537 - 2¹⁹ = 1202897249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1203421577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601710768 + 601710769.

It is an arithmetic number, because the mean of its divisors is an integer number (601710769).

Almost surely, 2^1203421537 is an apocalyptic number.

It is an amenable number.

1203421537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203421537 is an equidigital number, since it uses as much as digits as its factorization.

1203421537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 1203421537 is about 34690.3666310980. The cubic root of 1203421537 is about 1063.6675901256.

Adding to 1203421537 its reverse (7351243021), we get a palindrome (8554664558).

It can be divided in two parts, 1203 and 421537, that added together give a triangular number (422740 = T₉₁₉).

The spelling of 1203421537 in words is "one billion, two hundred three million, four hundred twenty-one thousand, five hundred thirty-seven".