70781061 has 32 divisors (see below), whose sum is σ = 108864000. Its totient is φ = 40540608.

The previous prime is 70781057. The next prime is 70781063. The reversal of 70781061 is 16018707.

It is not a de Polignac number, because 70781061 - 2² = 70781057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70781063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42910 + ... + 44528.

It is an arithmetic number, because the mean of its divisors is an integer number (3402000).

Almost surely, 2^70781061 is an apocalyptic number.

It is an amenable number.

70781061 is a deficient number, since it is larger than the sum of its proper divisors (38082939).

70781061 is a wasteful number, since it uses less digits than its factorization.

70781061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713.

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 70781061 is about 8413.1481028210. The cubic root of 70781061 is about 413.6557092327.

Adding to 70781061 its reverse (16018707), we get a palindrome (86799768).

The spelling of 70781061 in words is "seventy million, seven hundred eighty-one thousand, sixty-one".