131122740 has 48 divisors (see below), whose sum is σ = 419594112. Its totient is φ = 29970816.

The previous prime is 131122723. The next prime is 131122753. The reversal of 131122740 is 47221131.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155679 + ... + 156518.

It is an arithmetic number, because the mean of its divisors is an integer number (8741544).

Almost surely, 2^131122740 is an apocalyptic number.

131122740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131122740 is an abundant number, since it is smaller than the sum of its proper divisors (288471372).

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

131122740 is a wasteful number, since it uses less digits than its factorization.

131122740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312216 (or 312214 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 131122740 is about 11450.8838086848. The cubic root of 131122740 is about 508.0338756421.

Adding to 131122740 its reverse (47221131), we get a palindrome (178343871).

The spelling of 131122740 in words is "one hundred thirty-one million, one hundred twenty-two thousand, seven hundred forty".