157421389 has 8 divisors (see below), whose sum is σ = 159341312. Its totient is φ = 155509200.

The previous prime is 157421359. The next prime is 157421399. The reversal of 157421389 is 983124751.

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

It is a cyclic number.

It is not a de Polignac number, because 157421389 - 2⁹ = 157420877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157421339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46039 + ... + 49339.

It is an arithmetic number, because the mean of its divisors is an integer number (19917664).

Almost surely, 2^157421389 is an apocalyptic number.

It is an amenable number.

157421389 is a deficient number, since it is larger than the sum of its proper divisors (1919923).

157421389 is a wasteful number, since it uses less digits than its factorization.

157421389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3867.

The product of its digits is 60480, while the sum is 40.

The square root of 157421389 is about 12546.7680699055. The cubic root of 157421389 is about 539.9512861863.

The spelling of 157421389 in words is "one hundred fifty-seven million, four hundred twenty-one thousand, three hundred eighty-nine".