1242164145 has 8 divisors (see below), whose sum is σ = 1987462656. Its totient is φ = 662487536.

The previous prime is 1242164101. The next prime is 1242164171. The reversal of 1242164145 is 5414612421.

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

It is a cyclic number.

It is not a de Polignac number, because 1242164145 - 2¹³ = 1242155953 is a prime.

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, 41405457 + ... + 41405486.

It is an arithmetic number, because the mean of its divisors is an integer number (248432832).

Almost surely, 2^1242164145 is an apocalyptic number.

1242164145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1242164145 is a deficient number, since it is larger than the sum of its proper divisors (745298511).

1242164145 is an equidigital number, since it uses as much as digits as its factorization.

1242164145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82810951.

The product of its digits is 7680, while the sum is 30.

The square root of 1242164145 is about 35244.3491215259. The cubic root of 1242164145 is about 1074.9617134372.

Adding to 1242164145 its reverse (5414612421), we get a palindrome (6656776566).

The spelling of 1242164145 in words is "one billion, two hundred forty-two million, one hundred sixty-four thousand, one hundred forty-five".