142306520 has 32 divisors (see below), whose sum is σ = 334113120. Its totient is φ = 54447360.

The previous prime is 142306519. The next prime is 142306529. The reversal of 142306520 is 25603241.

It is a super-2 number, since 2×142306520² = 40502291269020800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142306529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76421 + ... + 78260.

It is an arithmetic number, because the mean of its divisors is an integer number (10441035).

Almost surely, 2^142306520 is an apocalyptic number.

142306520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142306520 is an abundant number, since it is smaller than the sum of its proper divisors (191806600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142306520 is a wasteful number, since it uses less digits than its factorization.

142306520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154715 (or 154711 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 142306520 is about 11929.2296482212. The cubic root of 142306520 is about 522.0854613627.

Adding to 142306520 its reverse (25603241), we get a palindrome (167909761).

The spelling of 142306520 in words is "one hundred forty-two million, three hundred six thousand, five hundred twenty".