1245432457 has 2 divisors, whose sum is σ = 1245432458. Its totient is φ = 1245432456.

The previous prime is 1245432407. The next prime is 1245432473. The reversal of 1245432457 is 7542345421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1236999241 + 8433216 = 35171^2 + 2904^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245432457 - 2¹⁹ = 1244908169 is a prime.

It is a super-2 number, since 2×1245432457² = 3102204009898113698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1245432407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622716228 + 622716229.

It is an arithmetic number, because the mean of its divisors is an integer number (622716229).

Almost surely, 2^1245432457 is an apocalyptic number.

It is an amenable number.

1245432457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245432457 is an equidigital number, since it uses as much as digits as its factorization.

1245432457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 37.

The square root of 1245432457 is about 35290.6851307820. The cubic root of 1245432457 is about 1075.9036805776.

Adding to 1245432457 its reverse (7542345421), we get a palindrome (8787777878).

The spelling of 1245432457 in words is "one billion, two hundred forty-five million, four hundred thirty-two thousand, four hundred fifty-seven".