242151420 has 48 divisors (see below), whose sum is σ = 774885888. Its totient is φ = 55348800.

The previous prime is 242151419. The next prime is 242151443. The reversal of 242151420 is 24151242.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287856 + ... + 288695.

It is an arithmetic number, because the mean of its divisors is an integer number (16143456).

Almost surely, 2^242151420 is an apocalyptic number.

242151420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242151420 is an abundant number, since it is smaller than the sum of its proper divisors (532734468).

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

242151420 is a wasteful number, since it uses less digits than its factorization.

242151420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576570 (or 576568 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 242151420 is about 15561.2152481739. The cubic root of 242151420 is about 623.2979139193.

The spelling of 242151420 in words is "two hundred forty-two million, one hundred fifty-one thousand, four hundred twenty".