1253624645 has 16 divisors (see below), whose sum is σ = 1851507840. Its totient is φ = 793502784.

The previous prime is 1253624641. The next prime is 1253624677. The reversal of 1253624645 is 5464263521.

It is a cyclic number.

It is not a de Polignac number, because 1253624645 - 2² = 1253624641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1253624599 and 1253624608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253624641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1377155 + ... + 1378064.

It is an arithmetic number, because the mean of its divisors is an integer number (115719240).

Almost surely, 2^1253624645 is an apocalyptic number.

It is an amenable number.

1253624645 is a deficient number, since it is larger than the sum of its proper divisors (597883195).

1253624645 is a wasteful number, since it uses less digits than its factorization.

1253624645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2755244.

The product of its digits is 172800, while the sum is 38.

The square root of 1253624645 is about 35406.5621742637. The cubic root of 1253624645 is about 1078.2575483551.

The spelling of 1253624645 in words is "one billion, two hundred fifty-three million, six hundred twenty-four thousand, six hundred forty-five".