133061421 has 4 divisors (see below), whose sum is σ = 177415232. Its totient is φ = 88707612.

The previous prime is 133061419. The next prime is 133061443. The reversal of 133061421 is 124160331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124160331 = 3 ⋅41386777.

It is not a de Polignac number, because 133061421 - 2¹ = 133061419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133061471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22176901 + ... + 22176906.

It is an arithmetic number, because the mean of its divisors is an integer number (44353808).

Almost surely, 2^133061421 is an apocalyptic number.

It is an amenable number.

133061421 is a deficient number, since it is larger than the sum of its proper divisors (44353811).

133061421 is an equidigital number, since it uses as much as digits as its factorization.

133061421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44353810.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 133061421 is about 11535.2252253695. The cubic root of 133061421 is about 510.5254369428.

The spelling of 133061421 in words is "one hundred thirty-three million, sixty-one thousand, four hundred twenty-one".