1245429121 has 2 divisors, whose sum is σ = 1245429122. Its totient is φ = 1245429120.

The previous prime is 1245429113. The next prime is 1245429137. The reversal of 1245429121 is 1219245421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1245313521 + 115600 = 35289^2 + 340^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245429121 - 2³ = 1245429113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1245429221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622714560 + 622714561.

It is an arithmetic number, because the mean of its divisors is an integer number (622714561).

Almost surely, 2^1245429121 is an apocalyptic number.

It is an amenable number.

1245429121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245429121 is an equidigital number, since it uses as much as digits as its factorization.

1245429121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 31.

The square root of 1245429121 is about 35290.6378661537. The cubic root of 1245429121 is about 1075.9027199427.

It can be divided in two parts, 124 and 5429121, that added together give a palindrome (5429245).

The spelling of 1245429121 in words is "one billion, two hundred forty-five million, four hundred twenty-nine thousand, one hundred twenty-one".