1249505 has 8 divisors (see below), whose sum is σ = 1506600. Its totient is φ = 994816.

The previous prime is 1249499. The next prime is 1249511. The reversal of 1249505 is 5059421.

It is an interprime number because it is at equal distance from previous prime (1249499) and next prime (1249511).

It can be written as a sum of positive squares in 4 ways, for example, as 85264 + 1164241 = 292^2 + 1079^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1249505 - 2⁴ = 1249489 is a prime.

It is a super-2 number, since 2×1249505² = 3122525490050, which contains 22 as substring.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 881 + ... + 1809.

It is an arithmetic number, because the mean of its divisors is an integer number (188325).

2^1249505 is an apocalyptic number.

It is an amenable number.

1249505 is a deficient number, since it is larger than the sum of its proper divisors (257095).

1249505 is an equidigital number, since it uses as much as digits as its factorization.

1249505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1249505 is about 1117.8125961001. The cubic root of 1249505 is about 107.7075133553.

The spelling of 1249505 in words is "one million, two hundred forty-nine thousand, five hundred five".