1227896145 has 192 divisors, whose sum is σ = 2748038400. Its totient is φ = 516741120.

The previous prime is 1227896129. The next prime is 1227896149. The reversal of 1227896145 is 5416987221.

1227896145 is a `hidden beast` number, since 1 + 2 + 27 + 8 + 9 + 614 + 5 = 666.

It is not a de Polignac number, because 1227896145 - 2⁴ = 1227896129 is a prime.

It is a super-2 number, since 2×1227896145² = 3015457885811722050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1227896145.

It is not an unprimeable number, because it can be changed into a prime (1227896149) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 6859666 + ... + 6859844.

It is an arithmetic number, because the mean of its divisors is an integer number (14312700).

Almost surely, 2^1227896145 is an apocalyptic number.

1227896145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1227896145 is an abundant number, since it is smaller than the sum of its proper divisors (1520142255).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1227896145 is a wasteful number, since it uses less digits than its factorization.

1227896145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 272 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 1227896145 is about 35041.3490750570. The cubic root of 1227896145 is about 1070.8300383890.

The spelling of 1227896145 in words is "one billion, two hundred twenty-seven million, eight hundred ninety-six thousand, one hundred forty-five".