1242164055 has 32 divisors (see below), whose sum is σ = 2190521088. Its totient is φ = 596044800.

The previous prime is 1242164051. The next prime is 1242164069. The reversal of 1242164055 is 5504612421.

It is not a de Polignac number, because 1242164055 - 2² = 1242164051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242164051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22801 + ... + 54810.

It is an arithmetic number, because the mean of its divisors is an integer number (68453784).

Almost surely, 2^1242164055 is an apocalyptic number.

1242164055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1242164055 is a deficient number, since it is larger than the sum of its proper divisors (948357033).

1242164055 is a wasteful number, since it uses less digits than its factorization.

1242164055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77727.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 1242164055 is about 35244.3478447254. The cubic root of 1242164055 is about 1074.9616874754.

Adding to 1242164055 its reverse (5504612421), we get a palindrome (6746776476).

It can be divided in two parts, 124216 and 4055, that added together give a triangular number (128271 = T₅₀₆).

The spelling of 1242164055 in words is "one billion, two hundred forty-two million, one hundred sixty-four thousand, fifty-five".