151221026 has 8 divisors (see below), whose sum is σ = 247452624. Its totient is φ = 68736820.

The previous prime is 151221023. The next prime is 151221047. The reversal of 151221026 is 620122151.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 151220989 and 151221007.

It is not an unprimeable number, because it can be changed into a prime (151221023) 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, 3436820 + ... + 3436863.

It is an arithmetic number, because the mean of its divisors is an integer number (30931578).

Almost surely, 2^151221026 is an apocalyptic number.

151221026 is a deficient number, since it is larger than the sum of its proper divisors (96231598).

151221026 is a wasteful number, since it uses less digits than its factorization.

151221026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6873696.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 151221026 is about 12297.1958592193. The cubic root of 151221026 is about 532.7670944374.

Adding to 151221026 its reverse (620122151), we get a palindrome (771343177).

The spelling of 151221026 in words is "one hundred fifty-one million, two hundred twenty-one thousand, twenty-six".