1211190461 has 4 divisors (see below), whose sum is σ = 1304358972. Its totient is φ = 1118021952.

The previous prime is 1211190457. The next prime is 1211190467. The reversal of 1211190461 is 1640911121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 162078361 + 1049112100 = 12731^2 + 32390^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211190461 - 2² = 1211190457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211190461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211190467) 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, 46584236 + ... + 46584261.

It is an arithmetic number, because the mean of its divisors is an integer number (326089743).

Almost surely, 2^1211190461 is an apocalyptic number.

It is an amenable number.

1211190461 is a deficient number, since it is larger than the sum of its proper divisors (93168511).

1211190461 is an equidigital number, since it uses as much as digits as its factorization.

1211190461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93168510.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 1211190461 is about 34802.1617288352. The cubic root of 1211190461 is about 1065.9515872094.

The spelling of 1211190461 in words is "one billion, two hundred eleven million, one hundred ninety thousand, four hundred sixty-one".