145961216 has 18 divisors (see below), whose sum is σ = 291352782. Its totient is φ = 72980480.

The previous prime is 145961209. The next prime is 145961239. The reversal of 145961216 is 612169541.

It can be written as a sum of positive squares in only one way, i.e., 98406400 + 47554816 = 9920^2 + 6896^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 284825 + ... + 285336.

Almost surely, 2^145961216 is an apocalyptic number.

145961216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

145961216 is a deficient number, since it is larger than the sum of its proper divisors (145391566).

145961216 is an frugal number, since it uses more digits than its factorization.

145961216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570177 (or 570163 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 145961216 is about 12081.4409736587. The cubic root of 145961216 is about 526.5171125504.

The spelling of 145961216 in words is "one hundred forty-five million, nine hundred sixty-one thousand, two hundred sixteen".