1249435723 has 6 divisors (see below), whose sum is σ = 1327255556. Its totient is φ = 1175939232.

The previous prime is 1249435711. The next prime is 1249435741. The reversal of 1249435723 is 3275349421.

It is not a de Polignac number, because 1249435723 - 2⁹ = 1249435211 is a prime.

It is a super-2 number, since 2×1249435723² = 3122179251817065458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1249435703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2161365 + ... + 2161942.

Almost surely, 2^1249435723 is an apocalyptic number.

1249435723 is a deficient number, since it is larger than the sum of its proper divisors (77819833).

1249435723 is an equidigital number, since it uses as much as digits as its factorization.

1249435723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4323341 (or 4323324 counting only the distinct ones).

The product of its digits is 181440, while the sum is 40.

The square root of 1249435723 is about 35347.3580766654. The cubic root of 1249435723 is about 1077.0552275599.

The spelling of 1249435723 in words is "one billion, two hundred forty-nine million, four hundred thirty-five thousand, seven hundred twenty-three".