1201681501 has 2 divisors, whose sum is σ = 1201681502. Its totient is φ = 1201681500.

The previous prime is 1201681463. The next prime is 1201681513. The reversal of 1201681501 is 1051861021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1166564025 + 35117476 = 34155^2 + 5926^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201681501 - 2¹⁹ = 1201157213 is a prime.

It is a super-2 number, since 2×1201681501² = 2888076859691226002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201681531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600840750 + 600840751.

It is an arithmetic number, because the mean of its divisors is an integer number (600840751).

Almost surely, 2^1201681501 is an apocalyptic number.

It is an amenable number.

1201681501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201681501 is an equidigital number, since it uses as much as digits as its factorization.

1201681501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 1201681501 is about 34665.2780314827. The cubic root of 1201681501 is about 1063.1546879277.

The spelling of 1201681501 in words is "one billion, two hundred one million, six hundred eighty-one thousand, five hundred one".