1209454553 has 16 divisors (see below), whose sum is σ = 1267776000. Its totient is φ = 1152455040.

The previous prime is 1209454537. The next prime is 1209454607. The reversal of 1209454553 is 3554549021.

It is a cyclic number.

It is not a de Polignac number, because 1209454553 - 2⁴ = 1209454537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1209454513) 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, 780023 + ... + 781571.

It is an arithmetic number, because the mean of its divisors is an integer number (79236000).

Almost surely, 2^1209454553 is an apocalyptic number.

It is an amenable number.

1209454553 is a deficient number, since it is larger than the sum of its proper divisors (58321447).

1209454553 is a wasteful number, since it uses less digits than its factorization.

1209454553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952.

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 1209454553 is about 34777.2131287140. The cubic root of 1209454553 is about 1065.4420943696.

The spelling of 1209454553 in words is "one billion, two hundred nine million, four hundred fifty-four thousand, five hundred fifty-three".