151021242 has 12 divisors (see below), whose sum is σ = 327212730. Its totient is φ = 50340408.

The previous prime is 151021237. The next prime is 151021249. The reversal of 151021242 is 242120151.

It can be written as a sum of positive squares in only one way, i.e., 142778601 + 8242641 = 11949^2 + 2871^2 .

It is a super-3 number, since 3×151021242³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 8390069 = 151021242 / (1 + 5 + 1 + 0 + 2 + 1 + 2 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (151021249) 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 5 ways as a sum of consecutive naturals, for example, 4195017 + ... + 4195052.

Almost surely, 2^151021242 is an apocalyptic number.

151021242 is an abundant number, since it is smaller than the sum of its proper divisors (176191488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

151021242 is a wasteful number, since it uses less digits than its factorization.

151021242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8390077 (or 8390074 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 151021242 is about 12289.0700217714. The cubic root of 151021242 is about 532.5323712385.

Adding to 151021242 its reverse (242120151), we get a palindrome (393141393).

The spelling of 151021242 in words is "one hundred fifty-one million, twenty-one thousand, two hundred forty-two".