142161770 has 32 divisors (see below), whose sum is σ = 271890000. Its totient is φ = 53415936.

The previous prime is 142161751. The next prime is 142161779. The reversal of 142161770 is 77161241.

142161770 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 77246521 + 64915249 = 8789^2 + 8057^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (142161779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4106 + ... + 17354.

Almost surely, 2^142161770 is an apocalyptic number.

142161770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142161770 is a deficient number, since it is larger than the sum of its proper divisors (129728230).

142161770 is a wasteful number, since it uses less digits than its factorization.

142161770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13322.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 142161770 is about 11923.1610741447. The cubic root of 142161770 is about 521.9083846596.

The spelling of 142161770 in words is "one hundred forty-two million, one hundred sixty-one thousand, seven hundred seventy".