149256587 has 4 divisors (see below), whose sum is σ = 149580816. Its totient is φ = 148932360.

The previous prime is 149256559. The next prime is 149256641. The reversal of 149256587 is 785652941.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 785652941 = 137 ⋅5734693.

It is a cyclic number.

It is not a de Polignac number, because 149256587 - 2¹² = 149252491 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149256287) 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, 161423 + ... + 162344.

It is an arithmetic number, because the mean of its divisors is an integer number (37395204).

Almost surely, 2^149256587 is an apocalyptic number.

149256587 is a deficient number, since it is larger than the sum of its proper divisors (324229).

149256587 is an equidigital number, since it uses as much as digits as its factorization.

149256587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324228.

The product of its digits is 604800, while the sum is 47.

The square root of 149256587 is about 12217.0613078596. The cubic root of 149256587 is about 530.4500591541.

It can be divided in two parts, 14925 and 6587, that added together give a palindrome (21512).

The spelling of 149256587 in words is "one hundred forty-nine million, two hundred fifty-six thousand, five hundred eighty-seven".