120251145 has 72 divisors (see below), whose sum is σ = 232516224. Its totient is φ = 52890432.

The previous prime is 120251143. The next prime is 120251179. The reversal of 120251145 is 541152021.

It is not a de Polignac number, because 120251145 - 2¹ = 120251143 is a prime.

It is a super-2 number, since 2×120251145² = 28920675747622050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (120251141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2038126 + ... + 2038184.

It is an arithmetic number, because the mean of its divisors is an integer number (3229392).

Almost surely, 2^120251145 is an apocalyptic number.

120251145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120251145 is a deficient number, since it is larger than the sum of its proper divisors (112265079).

120251145 is an equidigital number, since it uses as much as digits as its factorization.

120251145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 120251145 is about 10965.9083071125. The cubic root of 120251145 is about 493.5862733330.

The spelling of 120251145 in words is "one hundred twenty million, two hundred fifty-one thousand, one hundred forty-five".