1211705325 has 60 divisors (see below), whose sum is σ = 2258882208. Its totient is φ = 642103200.

The previous prime is 1211705303. The next prime is 1211705381. The reversal of 1211705325 is 5235071121.

1211705325 is a `hidden beast` number, since 12 + 117 + 0 + 532 + 5 = 666.

1211705325 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1211705325 - 2⁵ = 1211705293 is a prime.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 328240 + ... + 331910.

Almost surely, 2^1211705325 is an apocalyptic number.

1211705325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1211705325 is a deficient number, since it is larger than the sum of its proper divisors (1047176883).

1211705325 is a wasteful number, since it uses less digits than its factorization.

1211705325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3856 (or 3842 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 1211705325 is about 34809.5579546768. The cubic root of 1211705325 is about 1066.1026073195.

Adding to 1211705325 its reverse (5235071121), we get a palindrome (6446776446).

The spelling of 1211705325 in words is "one billion, two hundred eleven million, seven hundred five thousand, three hundred twenty-five".