1161420751 has 2 divisors, whose sum is σ = 1161420752. Its totient is φ = 1161420750.

The previous prime is 1161420737. The next prime is 1161420763. The reversal of 1161420751 is 1570241611.

It is a strong prime.

It is an emirp because it is prime and its reverse (1570241611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1161420751 - 2¹¹ = 1161418703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161426751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580710375 + 580710376.

It is an arithmetic number, because the mean of its divisors is an integer number (580710376).

Almost surely, 2^1161420751 is an apocalyptic number.

1161420751 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161420751 is an equidigital number, since it uses as much as digits as its factorization.

1161420751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 1161420751 is about 34079.6236921713. The cubic root of 1161420751 is about 1051.1463673154.

The spelling of 1161420751 in words is "one billion, one hundred sixty-one million, four hundred twenty thousand, seven hundred fifty-one".