781401134 has 8 divisors (see below), whose sum is σ = 1172325000. Its totient is φ = 390626136.

The previous prime is 781401121. The next prime is 781401139. The reversal of 781401134 is 431104187.

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

It is a super-2 number, since 2×781401134² = 1221175464432971912, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 781401097 and 781401106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (781401139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23009 + ... + 45740.

It is an arithmetic number, because the mean of its divisors is an integer number (146540625).

Almost surely, 2^781401134 is an apocalyptic number.

781401134 is a deficient number, since it is larger than the sum of its proper divisors (390923866).

781401134 is a wasteful number, since it uses less digits than its factorization.

781401134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74434.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 781401134 is about 27953.5531551894. The cubic root of 781401134 is about 921.0672609552.

The spelling of 781401134 in words is "seven hundred eighty-one million, four hundred one thousand, one hundred thirty-four".