1201651 has 6 divisors (see below), whose sum is σ = 1320956. Its totient is φ = 1092300.

The previous prime is 1201643. The next prime is 1201687. The reversal of 1201651 is 1561021.

It is a happy number.

It is not a de Polignac number, because 1201651 - 2³ = 1201643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4845 + ... + 5086.

2^1201651 is an apocalyptic number.

1201651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1201651 is a deficient number, since it is larger than the sum of its proper divisors (119305).

1201651 is an equidigital number, since it uses as much as digits as its factorization.

1201651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9953 (or 9942 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1201651 is about 1096.1984309421. The cubic root of 1201651 is about 106.3145692878.

Adding to 1201651 its reverse (1561021), we get a palindrome (2762672).

It can be divided in two parts, 120 and 1651, that added together give a palindrome (1771).

The spelling of 1201651 in words is "one million, two hundred one thousand, six hundred fifty-one".