1245156623 has 2 divisors, whose sum is σ = 1245156624. Its totient is φ = 1245156622.

The previous prime is 1245156617. The next prime is 1245156637. The reversal of 1245156623 is 3266515421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1245156623 - 2⁶ = 1245156559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1245156223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622578311 + 622578312.

It is an arithmetic number, because the mean of its divisors is an integer number (622578312).

Almost surely, 2^1245156623 is an apocalyptic number.

1245156623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245156623 is an equidigital number, since it uses as much as digits as its factorization.

1245156623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 35.

The square root of 1245156623 is about 35286.7768859668. The cubic root of 1245156623 is about 1075.8242455921.

The spelling of 1245156623 in words is "one billion, two hundred forty-five million, one hundred fifty-six thousand, six hundred twenty-three".