1201325555 has 4 divisors (see below), whose sum is σ = 1441590672. Its totient is φ = 961060440.

The previous prime is 1201325549. The next prime is 1201325561. The reversal of 1201325555 is 5555231021.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1201325549) and next prime (1201325561).

It is not a de Polignac number, because 1201325555 - 2²² = 1197131251 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120132551 + ... + 120132560.

It is an arithmetic number, because the mean of its divisors is an integer number (360397668).

Almost surely, 2^1201325555 is an apocalyptic number.

1201325555 is a deficient number, since it is larger than the sum of its proper divisors (240265117).

1201325555 is an equidigital number, since it uses as much as digits as its factorization.

1201325555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240265116.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 1201325555 is about 34660.1436090504. The cubic root of 1201325555 is about 1063.0497064140.

Adding to 1201325555 its reverse (5555231021), we get a palindrome (6756556576).

The spelling of 1201325555 in words is "one billion, two hundred one million, three hundred twenty-five thousand, five hundred fifty-five".