1207145553 has 4 divisors (see below), whose sum is σ = 1609527408. Its totient is φ = 804763700.

The previous prime is 1207145551. The next prime is 1207145587. The reversal of 1207145553 is 3555417021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1207145553 - 2¹ = 1207145551 is a prime.

It is a super-2 number, since 2×1207145553² = 2914400772255351618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1207145551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201190923 + ... + 201190928.

It is an arithmetic number, because the mean of its divisors is an integer number (402381852).

Almost surely, 2^1207145553 is an apocalyptic number.

It is an amenable number.

1207145553 is a deficient number, since it is larger than the sum of its proper divisors (402381855).

1207145553 is an equidigital number, since it uses as much as digits as its factorization.

1207145553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402381854.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 1207145553 is about 34744.0002446466. Note that the first 3 decimals coincide. The cubic root of 1207145553 is about 1064.7636417006.

The spelling of 1207145553 in words is "one billion, two hundred seven million, one hundred forty-five thousand, five hundred fifty-three".