612121270 has 16 divisors (see below), whose sum is σ = 1139812560. Its totient is φ = 236405344.

The previous prime is 612121253. The next prime is 612121273. The reversal of 612121270 is 72121216.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612121273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1055092 + ... + 1055671.

It is an arithmetic number, because the mean of its divisors is an integer number (71238285).

Almost surely, 2^612121270 is an apocalyptic number.

612121270 is a deficient number, since it is larger than the sum of its proper divisors (527691290).

612121270 is a wasteful number, since it uses less digits than its factorization.

612121270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110799.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 612121270 is about 24741.0846569022. The cubic root of 612121270 is about 849.0745498615.

Adding to 612121270 its reverse (72121216), we get a palindrome (684242486).

The spelling of 612121270 in words is "six hundred twelve million, one hundred twenty-one thousand, two hundred seventy".