139122900 has 288 divisors, whose sum is σ = 542465280. Its totient is φ = 29859840.

The previous prime is 139122899. The next prime is 139122901. The reversal of 139122900 is 9221931.

It is an interprime number because it is at equal distance from previous prime (139122899) and next prime (139122901).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139122901) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 321084 + ... + 321516.

It is an arithmetic number, because the mean of its divisors is an integer number (1883560).

Almost surely, 2^139122900 is an apocalyptic number.

139122900 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 139122900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271232640).

139122900 is an abundant number, since it is smaller than the sum of its proper divisors (403342380).

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

139122900 is a wasteful number, since it uses less digits than its factorization.

139122900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 139122900 is about 11795.0370919298. The cubic root of 139122900 is about 518.1627719013.

The spelling of 139122900 in words is "one hundred thirty-nine million, one hundred twenty-two thousand, nine hundred".