13142740 has 24 divisors (see below), whose sum is σ = 29723400. Its totient is φ = 4852608.

The previous prime is 13142711. The next prime is 13142743. The reversal of 13142740 is 4724131.

It can be written as a sum of positive squares in 4 ways, for example, as 948676 + 12194064 = 974^2 + 3492^2 .

It is a super-2 number, since 2×13142740² = 345463229415200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13142743) 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, 25015 + ... + 25534.

It is an arithmetic number, because the mean of its divisors is an integer number (1238475).

Almost surely, 2^13142740 is an apocalyptic number.

13142740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13142740 is an abundant number, since it is smaller than the sum of its proper divisors (16580660).

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

13142740 is a wasteful number, since it uses less digits than its factorization.

13142740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50571 (or 50569 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 13142740 is about 3625.2917124005. The cubic root of 13142740 is about 235.9909265879.

Adding to 13142740 its reverse (4724131), we get a palindrome (17866871).

The spelling of 13142740 in words is "thirteen million, one hundred forty-two thousand, seven hundred forty".