511121342 has 4 divisors (see below), whose sum is σ = 766682016. Its totient is φ = 255560670.

The previous prime is 511121339. The next prime is 511121353. The reversal of 511121342 is 243121115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 243121115 = 5 ⋅48624223.

It is a super-2 number, since 2×511121342² = 522490052495761928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127780334 + ... + 127780337.

It is an arithmetic number, because the mean of its divisors is an integer number (191670504).

Almost surely, 2^511121342 is an apocalyptic number.

511121342 is a deficient number, since it is larger than the sum of its proper divisors (255560674).

511121342 is a wasteful number, since it uses less digits than its factorization.

511121342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255560673.

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

The square root of 511121342 is about 22607.9928786259. The cubic root of 511121342 is about 799.5421035886.

Adding to 511121342 its reverse (243121115), we get a palindrome (754242457).

The spelling of 511121342 in words is "five hundred eleven million, one hundred twenty-one thousand, three hundred forty-two".