133420451 has 16 divisors (see below), whose sum is σ = 146188800. Its totient is φ = 121331808.

The previous prime is 133420439. The next prime is 133420457. The reversal of 133420451 is 154024331.

It is a cyclic number.

It is not a de Polignac number, because 133420451 - 2²⁶ = 66311587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133420457) 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, 45920 + ... + 48738.

It is an arithmetic number, because the mean of its divisors is an integer number (9136800).

Almost surely, 2^133420451 is an apocalyptic number.

133420451 is a deficient number, since it is larger than the sum of its proper divisors (12768349).

133420451 is a wasteful number, since it uses less digits than its factorization.

133420451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2938.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 133420451 is about 11550.7770734267. Note that the first 3 decimals coincide. The cubic root of 133420451 is about 510.9841958544.

Adding to 133420451 its reverse (154024331), we get a palindrome (287444782).

The spelling of 133420451 in words is "one hundred thirty-three million, four hundred twenty thousand, four hundred fifty-one".