136450721 has 16 divisors (see below), whose sum is σ = 158070528. Its totient is φ = 116409600.

The previous prime is 136450703. The next prime is 136450753. The reversal of 136450721 is 127054631.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136450721 is a prime.

It is a super-2 number, since 2×136450721² = 37237598522839682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136450781) 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, 79751 + ... + 81443.

It is an arithmetic number, because the mean of its divisors is an integer number (9879408).

Almost surely, 2^136450721 is an apocalyptic number.

136450721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

136450721 is a deficient number, since it is larger than the sum of its proper divisors (21619807).

136450721 is a wasteful number, since it uses less digits than its factorization.

136450721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 136450721 is about 11681.2123086604. The cubic root of 136450721 is about 514.8237949363.

The spelling of 136450721 in words is "one hundred thirty-six million, four hundred fifty thousand, seven hundred twenty-one".