1213154065 has 8 divisors (see below), whose sum is σ = 1457160768. Its totient is φ = 969606000.

The previous prime is 1213154029. The next prime is 1213154081. The reversal of 1213154065 is 5604513121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1213154065 - 2¹³ = 1213145873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108811 + ... + 119440.

It is an arithmetic number, because the mean of its divisors is an integer number (182145096).

Almost surely, 2^1213154065 is an apocalyptic number.

It is an amenable number.

1213154065 is a deficient number, since it is larger than the sum of its proper divisors (244006703).

1213154065 is a wasteful number, since it uses less digits than its factorization.

1213154065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229319.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1213154065 is about 34830.3612527921. The cubic root of 1213154065 is about 1066.5273228892.

Adding to 1213154065 its reverse (5604513121), we get a palindrome (6817667186).

The spelling of 1213154065 in words is "one billion, two hundred thirteen million, one hundred fifty-four thousand, sixty-five".