69142144 has 16 divisors (see below), whose sum is σ = 137744370. Its totient is φ = 34571008.

The previous prime is 69142133. The next prime is 69142189. The reversal of 69142144 is 44124196.

It can be written as a sum of positive squares in only one way, i.e., 49000000 + 20142144 = 7000^2 + 4488^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269959 + ... + 270214.

Almost surely, 2^69142144 is an apocalyptic number.

69142144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

69142144 is a deficient number, since it is larger than the sum of its proper divisors (68602226).

69142144 is an equidigital number, since it uses as much as digits as its factorization.

69142144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540187 (or 540175 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 69142144 is about 8315.1755243049. The cubic root of 69142144 is about 410.4380485732.

The spelling of 69142144 in words is "sixty-nine million, one hundred forty-two thousand, one hundred forty-four".