151649 has 4 divisors (see below), whose sum is σ = 152880. Its totient is φ = 150420.

The previous prime is 151643. The next prime is 151651. The reversal of 151649 is 946151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 151649 - 2¹⁶ = 86113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (151643) 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, 407 + ... + 684.

It is an arithmetic number, because the mean of its divisors is an integer number (38220).

2¹⁵¹⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

151649 is a deficient number, since it is larger than the sum of its proper divisors (1231).

151649 is a wasteful number, since it uses less digits than its factorization.

151649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230.

The product of its digits is 1080, while the sum is 26.

The square root of 151649 is about 389.4213656183. The cubic root of 151649 is about 53.3269219724.

The spelling of 151649 in words is "one hundred fifty-one thousand, six hundred forty-nine".