1225533437 has 2 divisors, whose sum is σ = 1225533438. Its totient is φ = 1225533436.

The previous prime is 1225533433. The next prime is 1225533473. The reversal of 1225533437 is 7343355221.

Together with next prime (1225533473) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1075446436 + 150087001 = 32794^2 + 12251^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225533437 - 2² = 1225533433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1225533397 and 1225533406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225533433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612766718 + 612766719.

It is an arithmetic number, because the mean of its divisors is an integer number (612766719).

Almost surely, 2^1225533437 is an apocalyptic number.

It is an amenable number.

1225533437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225533437 is an equidigital number, since it uses as much as digits as its factorization.

1225533437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 35.

The square root of 1225533437 is about 35007.6196991455. The cubic root of 1225533437 is about 1070.1427698393.

Adding to 1225533437 its reverse (7343355221), we get a palindrome (8568888658).

The spelling of 1225533437 in words is "one billion, two hundred twenty-five million, five hundred thirty-three thousand, four hundred thirty-seven".