135374321 has 4 divisors (see below), whose sum is σ = 137088000. Its totient is φ = 133660644.

The previous prime is 135374287. The next prime is 135374329. The reversal of 135374321 is 123473531.

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.

It is a cyclic number.

It is not a de Polignac number, because 135374321 - 2¹⁸ = 135112177 is a prime.

It is a super-2 number, since 2×135374321² = 36652413572422082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135374329) 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, 856721 + ... + 856878.

It is an arithmetic number, because the mean of its divisors is an integer number (34272000).

Almost surely, 2^135374321 is an apocalyptic number.

It is an amenable number.

135374321 is a deficient number, since it is larger than the sum of its proper divisors (1713679).

135374321 is an equidigital number, since it uses as much as digits as its factorization.

135374321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713678.

The product of its digits is 7560, while the sum is 29.

The square root of 135374321 is about 11635.0470991741. The cubic root of 135374321 is about 513.4664797234.

The spelling of 135374321 in words is "one hundred thirty-five million, three hundred seventy-four thousand, three hundred twenty-one".