1253745 has 32 divisors (see below), whose sum is σ = 2298240. Its totient is φ = 648000.

The previous prime is 1253741. The next prime is 1253761. The reversal of 1253745 is 5473521.

It is a happy number.

It is not a de Polignac number, because 1253745 - 2² = 1253741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

1253745 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4870 + ... + 5120.

It is an arithmetic number, because the mean of its divisors is an integer number (71820).

2^1253745 is an apocalyptic number.

1253745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1253745 is a deficient number, since it is larger than the sum of its proper divisors (1044495).

1253745 is a wasteful number, since it uses less digits than its factorization.

1253745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 296 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 1253745 is about 1119.7075511043. The cubic root of 1253745 is about 107.8292053509.

The spelling of 1253745 in words is "one million, two hundred fifty-three thousand, seven hundred forty-five".