142691400 has 72 divisors (see below), whose sum is σ = 479211330. Its totient is φ = 38050560.

The previous prime is 142691399. The next prime is 142691401. The reversal of 142691400 is 4196241.

It is an interprime number because it is at equal distance from previous prime (142691399) and next prime (142691401).

It can be written as a sum of positive squares in 3 ways, for example, as 81757764 + 60933636 = 9042^2 + 7806^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (142691401) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 37837 + ... + 41436.

Almost surely, 2^142691400 is an apocalyptic number.

142691400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142691400 is an abundant number, since it is smaller than the sum of its proper divisors (336519930).

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

142691400 is a wasteful number, since it uses less digits than its factorization.

142691400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79295 (or 79283 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 142691400 is about 11945.3505599459. The cubic root of 142691400 is about 522.5557124114. Note that the first 3 decimals are identical.

The spelling of 142691400 in words is "one hundred forty-two million, six hundred ninety-one thousand, four hundred".