1201309951 has 2 divisors, whose sum is σ = 1201309952. Its totient is φ = 1201309950.

The previous prime is 1201309937. The next prime is 1201310003. The reversal of 1201309951 is 1599031021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201309951 - 2¹¹ = 1201307903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201309931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600654975 + 600654976.

It is an arithmetic number, because the mean of its divisors is an integer number (600654976).

Almost surely, 2^1201309951 is an apocalyptic number.

1201309951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201309951 is an equidigital number, since it uses as much as digits as its factorization.

1201309951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 1201309951 is about 34659.9185082712. The cubic root of 1201309951 is about 1063.0451037484.

The spelling of 1201309951 in words is "one billion, two hundred one million, three hundred nine thousand, nine hundred fifty-one".