140920520 has 64 divisors (see below), whose sum is σ = 342785520. Its totient is φ = 51830784.

The previous prime is 140920489. The next prime is 140920547. The reversal of 140920520 is 25029041.

It can be written as a sum of positive squares in 8 ways, for example, as 69923044 + 70997476 = 8362^2 + 8426^2 .

It is a super-3 number, since 3×140920520³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237344 + ... + 237936.

Almost surely, 2^140920520 is an apocalyptic number.

140920520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140920520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171392760).

140920520 is an abundant number, since it is smaller than the sum of its proper divisors (201865000).

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

140920520 is a wasteful number, since it uses less digits than its factorization.

140920520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074 (or 1070 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 140920520 is about 11870.9949035454. The cubic root of 140920520 is about 520.3849713343.

Adding to 140920520 its reverse (25029041), we get a palindrome (165949561).

The spelling of 140920520 in words is "one hundred forty million, nine hundred twenty thousand, five hundred twenty".