133401720 has 64 divisors (see below), whose sum is σ = 423753120. Its totient is φ = 33480704.

The previous prime is 133401713. The next prime is 133401727. The reversal of 133401720 is 27104331.

It is an interprime number because it is at equal distance from previous prime (133401713) and next prime (133401727).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133401727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30657 + ... + 34736.

Almost surely, 2^133401720 is an apocalyptic number.

133401720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133401720 is an abundant number, since it is smaller than the sum of its proper divisors (290351400).

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

133401720 is a wasteful number, since it uses less digits than its factorization.

133401720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65424 (or 65420 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 133401720 is about 11549.9662337169. The cubic root of 133401720 is about 510.9602822469.

The spelling of 133401720 in words is "one hundred thirty-three million, four hundred one thousand, seven hundred twenty".