1261112623 has 2 divisors, whose sum is σ = 1261112624. Its totient is φ = 1261112622.

The previous prime is 1261112591. The next prime is 1261112663. The reversal of 1261112623 is 3262111621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1261112623 - 2⁵ = 1261112591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1261112663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630556311 + 630556312.

It is an arithmetic number, because the mean of its divisors is an integer number (630556312).

Almost surely, 2^1261112623 is an apocalyptic number.

1261112623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1261112623 is an equidigital number, since it uses as much as digits as its factorization.

1261112623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 1261112623 is about 35512.1475413696. The cubic root of 1261112623 is about 1080.4001212339.

The spelling of 1261112623 in words is "one billion, two hundred sixty-one million, one hundred twelve thousand, six hundred twenty-three".