151402609 has 4 divisors (see below), whose sum is σ = 154259316. Its totient is φ = 148545904.

The previous prime is 151402597. The next prime is 151402633. The reversal of 151402609 is 906204151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906204151 = 29 ⋅31248419.

It can be written as a sum of positive squares in 2 ways, for example, as 59721984 + 91680625 = 7728^2 + 9575^2 .

It is a cyclic number.

It is not a de Polignac number, because 151402609 - 2²⁵ = 117848177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151402639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1428274 + ... + 1428379.

It is an arithmetic number, because the mean of its divisors is an integer number (38564829).

Almost surely, 2^151402609 is an apocalyptic number.

It is an amenable number.

151402609 is a deficient number, since it is larger than the sum of its proper divisors (2856707).

151402609 is an equidigital number, since it uses as much as digits as its factorization.

151402609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856706.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 151402609 is about 12304.5767501365. The cubic root of 151402609 is about 532.9802542825.

The spelling of 151402609 in words is "one hundred fifty-one million, four hundred two thousand, six hundred nine".